Which is greater?

Ten Thousands |
Thousands |
Hundreds |
Tens |
Ones |

7 |
1 |
4 |
3 |
2 |

8 |
7 |
6 |
7 |
8 |

Compare digits from left to right until the digits are not the same.

In the ten thousands place, 8 is greater than 7.

So 87,678 is greater than 71,432.