The Croatian forward, 16, has emerged from the youth system of his native Cibalia Vinkovci and is thought to have been monitored by a number of leading European clubs.
However, Serie A now looks to be his likely destination after Dabro admitted that he was on the verge of a move to Stadio Artemio Franchi.
"I confirm I have reached an agreement with Fiorentina. Inter, Liverpool and (Manchester) City followed me too, but I've chosen Fiorentina," he told tuttomercatoweb.
"They have shown since the beginning to be a serious side and to be very interested in me."
Dabro, who has played for his country at Under-16 and Under-17 level, said the arrival of Mario Gomez at the club from Bayern Munich was one of the major influences in his decision.
"What striker am I like? I am like Cavani, Falcao, Van Persie and Mario Gomez. And so, although initially I'm going to play in the Fiorentina's youth, it will be a great opportunity for me to see the German bomber (Gomez) play very closely to me. I cannot wait," he added.
