Audacity now has a better reverb effect, and it includes presets.
After you cut the applause off, add a short fade-out to the end of the remaining reverb so that it doesn’t end abruptly.
Unfortunately there’s a clap just before the main applause starts, so we don’t have much of the orchestral decay to work with, so I used the “Change Tempo” effect (“high quality” enabled) to extend the decay after cutting off the applause.
Then I duplicated the final note, applied “Large Room” reverb, “Wet only” to the duplicate.
Then apply “Fade In” a couple of times to the start of the duplicate to give a smooth transition into the reverb, and finally mixed the two tracks together.