Lengthening an audio track

I have an audio track that is 4 minutes long. I need it to be 7 minutes long to fit a video I am producing. How do I increase the duration of the audio track from 4 minutes to 7 minutes? Thanks

Repeat it?

Seems Like an obvious solution to just repeat it, but leaves a gap as the music fades at the end of the song. There is a function in Adobe Audition that allows a track to be remixed and then extends the duration of the music by seamlessly splicing together the music to a specific length. Hoping Audacity has a similar feature/function.