Here $$102345680$$ is a $$9-$$digit number
$$63521047$$ and $$63514759$$ are both $$8-$$digit numbers in which the same numbers namely $$6,3,$$ and $$5$$ are placed at crores, ten lakhs and lakhs place respectively whereas $$2$$ and $$1$$ are placed at ten thousands place
Since $$2 > 1$$
Therefore $$63521047 > 63514759$$
$$7354206$$ and $$7355014$$ are both $$7-$$digits numbers
Here the same numbers $$7, 3$$ and $$5$$ are placed at crores, ten lakhs and lakhs place respectively whereas $$5$$ and $$4$$ are placed at ten thousands place
Since $$5 > 4$$
Therefore $$7355014 > 7354206$$
The given numbers in the descending order are:
$$102345680 > 63521047 > 63514759 > 7355014 > 7354206$$