Michael Hussey hit an 86-ball century as Australia sealed a 3-0 one-day series whitewash of Bangladesh with a 66-run victory.
Having chosen to bat first in Mirpur, Shane Watson carried on from where he left off in the second match with a boundary-laden 72 to set the platform for a total of 361-8.
Watson, who hit a record 15 sixes in his 185 not out on Sunday, put on 110 in 11.5 overs with new opening partner Ricky Ponting, dispatching 11 fours and three sixes in his 40-ball contribution before being bowled by Abdur Razzak.
Ponting and his successor as captain Michael Clarke both fell for 47 before some late fireworks from Hussey, Mitchell Johnson and John Hastings powered Australia up to their fourth highest ODI total.
Hussey had reached his half-century at exactly a run-a-ball and then upped the tempo; the left-hander needed just 36 more deliveries to reach his third ODI hundred before eventually being lbw to paceman Shafiul Islam (1-77) for 108 in the final over.
He received big-hitting support from Johnson (41) and Hastings (21no) as 94 runs were scored in the final 10 overs of the innings.
Left-arm spinner Razzak was the pick of the home attack with 3-58, while seam bowler Mashrafe Mortaza also took three wickets but went for 80 runs in the process.
Bangladesh opener Tamim Iqbal briefly kept his side up with the required rate with 32 off 17 balls at the start of their run chase.
His fun, however, was ended by Johnson in the fifth over and thereafter the Tigers appeared content to avoid embarrassment and bat out the overs.
They achieved that aim through a second-wicket stand of 136 between Imrul Kayes and Shahriar Nafees.
Kayes was denied a century when he edged behind for 93 to give debutant seamer James Pattinson (1-39) a maiden ODI scalp.
Johnson (3-67) followed up with the wicket of Nafees for 60 but Mahmudullah stood firm with 68 not out as Bangladesh finished up on 295-6 - their sixth best total in one-day internationals.