In this task, you are given a list. This list contains many lists of integers. The list is several items written within a []. Your task is to find the maximum number among the members of each inner list. The output should be a list comprised of the maximums with the same order as the internal lists.
[[-122, -128, -184, -60, -9], [-28, -64, -3, -52, 2, 42, 47], [32, -52, 42, 56, -3, -72], [-130, 40, -159, -180, -20]]