Determine Exact Layover Booking

You are given a layover duration `target_hours` and a list of experience durations `durations`, such as `[2.0, 3.6]`, where each number represents the number of hours needed for one bookable experience. You may book any experience **multiple times**. Determine whether it is possible to choose experiences so that their total time **exactly equals** the layover duration. Additional assumptions: - All durations are positive. - Each duration and the target have at most one decimal place. - Exact equality is required. Return `true` if the layover can be filled exactly, otherwise return `false`.