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.
[[-148, -51, -172], [10, -168, -183, 35, -33, 87, 92], [-189, -39, -41, -166], [81, -122, -17]]