Final answer:
In the final round of the Price is Right, Nathaniel won a trip to Lima, Peru.
Step-by-step explanation:
In the final round of the Price is Right, Nathaniel won a **trip to Lima, Peru**. This is revealed in the story where it says, 'He wins the final round, and to his family's enthusiasm, earns a trip to Lima, Peru.' Nathaniel selflessly passed on the offer of McDonald's for life and chose a prize that would appeal to his entire family.