Final answer:
Lilliput's income per capita in 2015 was $2,389.20 (rounded to two decimal places).
Step-by-step explanation:
To find Lilliput's income per capita in 2015, we need to divide the aggregate income by the population.
The formula to calculate income per capita is:
Income per capita = Aggregate income / Population
Plugging in the given values:
Income per capita = $48,002,000,500 / 20,100,500 = $2,389.20
Therefore, Lilliput's income per capita in 2015 was $2,389.20 (rounded to two decimal places).