What number do you suppose would follow this one?

kid reading a book

Is it possible to guess the missing number?

Ava, junior mathematics teacher, clad in smart casual dress begun asking a riddle from among students of class after writing it on white board. After reading it, students initiated thinking about the possible correct answer. She had asked what number would come after number series of 6,457, 7,645, 5,764,?????????????

Ava noticed many students of her mathematics class couldn't figure out the correct number and majority gave wrong answers. On seeing their lack of motivation, she promised to give Hershey's chocolate to the one who gives the correct answer. Suddenly, Archie, Leo, Jack, Lily, Anne and Isla raise their hands to give out answer. Ava asked them to submit their answers after writing it in their notebook. So they followed their teacher's instructions. All the six junior class students written 4,576 the next number which was correct. The entire class clapped when Ava gave Hershey's chocolate to each of them as their reward.

Coming to you readers of reader’s blog, do you know how next number 4,576 come? Let me tell you the logic behind it. If you just take last number which was 4 in the last number of 5,764, just add 4 in previous number before the first three digits, the next number would be 4,576. Got it now.