$$9873426$$ and $$9874012$$ are both $$7-$$digits numbers in which the same numbers $$9, 8$$ and $$7$$ are placed at ten lakhs, lakhs and ten thousands places respectively and the digits $$3$$ and $$4$$ are placed at thousands places
Since $$3 < 4$$
Hence $$9873426 < 9874012$$
$$24615019$$ and $$24620010$$ are both $$8-$$digits numbers in which the same numbers $$2, 4$$ and $$6$$ are placed at crores, ten lakhs and lakhs respectively, since $$2$$ and $$1$$ are ten thousands place
Hence $$24615019 < 24620010$$
The given numbers in ascending order are:
$$990357 < 9873426 < 9874012 < 24615019 < 24620010$$