| 50000 | x | ÷ | 365 | × | 469 | + | 10000 | x | ÷ | 365 | × | 428 | + | 10000 | x | ÷ | 365 | × | 409 | = | 513973 100 |
| 方程左边 = | 4690000 73 | x | + | 856000 73 | x | + | 818000 73 | x | + | 622000 73 | x |
| = | 6986000 73 | x |
6986000 73 | x | = | 513973 100 |
| x | = | 513973 100 | ÷ | 6986000 73 |
| = | 513973 100 | × | 73 6986000 |
| x | = | 37520029 698600000 |
| x | = | 0.053707 |