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.
[[-160, 91, -78, 74, -200], [76, -91, -65, -53, -122], [-17, -131, 20]]