Aminiasi Tuimaba and Napolioni Bolaca scored in the first half as Fiji led 14-5 at the break.
Isoa Tabu added another try in the second half to secure the win.
Fiji will play Japan SDS today while Australia play Samoa in the Men's Olympic Qualifier Final.
The Fiji Airways Fijiana 7s Team will take on Samoa in the first semifinal of the Women's Olympic Qualifier while Papua New Guinea take on Solomon Islands in the second semifinal at 12.34pm.
Australia will take on New Zealand in the Women's Oceania International Final.