.
Next number is 8.7964.
Or 5.19.
Or -1.
Or .
Or .
Or .
More seriously, this question MAKES NO SENSE.
Without a context, ANY number can be next. And any number can be justified as "the next".
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It is not a Math question and is not a Math problem, at all.
Those who ask you such questions, simply invite you to kill your time --- to kill for nothing, without any compensation . . .
You, in turn, re-address it to us, in order for we, the tutors, kill our time // (in one package with yours . . . )
Thank you very much, but we, the tutors, are at this forum not for such an unenviable role. We deserve a better fate (!)
The future-tellers are next door . . .
Not at this forum, I want to say . . .
Please DO NOT POST similar problems/questions to this forum again.
Since every time when I see such a request, I will copy, paste and submit this text in response.
Have a nice day / evening / night / morning / afternoon and tea time (!)