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.
[[60, -121, -47, -34, -99], [-172, 26], [-87, 61, -54, 39], [-150, 74, -19, -90, 53], [-116, -189, -28, -36]]