I very much doubt Melbourne will beat Adelaide, they play very poorly over there. Ask my missus she's been to 3 games with me at AAMI (Melb and Port twice, Melb and Adelaide once) and even she reckons they are terrible in Adelaide.
The only way Melbourne will finish 3rd is if Freo Lose today and next week against Port (Unlikely to lose against Port), Sydney Lose to Carlton at the SCG (Extremely unlikely), and if Brisbane beat St Kilda at the Gabba (50/50 due to Saints being so up and down). Also Collingwood (If they beat the Blues and Kangas) is in the mix to finish above Melbourne.
The bottom line is Melbourne are likely to finish 6th or 7th, and be lucky to win in the first round of the finals. If this happens I'd be calling for Danihers head on the chopping board.