In Logic Pro, choose Edit > Tempo > Apply Region Tempo to Project Tempo.
You can also export the current tempo value within the borders (start and end points) of a selected audio file in the Tracks area. However, you should first remove any tempo information that exists in the audio file.
In Logic Pro, choose Edit > Tempo > Remove Tempo Information from Audio File.
You can then export the current tempo information to the audio file.
In Logic Pro, choose Edit > Tempo > Write Project Tempo to Audio File.
Download the guides:
Logic Pro User Guide: PDF
Logic Pro Effects: PDF