Final answer:
The information provided does not contain details on how Potano and his warriors defeated Hiti's monstrous alligator, making it impossible to provide a factual answer.
Step-by-step explanation:
The question of how Potano and his warriors defeated Hiti's monstrous alligator seems to reference a mythological or folkloric tale rather than a historical event. Since none of the provided references directly answer this question, and because it seems to be drawing on a storytelling tradition, it's likely part of a larger myth or story that is not covered within the provided information. If the narrative mirrors that of other myths, such as the Greek hero Perseus who turned a monster to stone to save Andromeda, one might speculate that there is a similar heroic action taken by Potano. However, without precise details, the actual method by which Potano achieves this feat cannot be determined from the information given.