| X | ÷ | ( | X | + | 4000 | ) | = | 3780 | ÷ | 4190 |
| Multiply both sides of the equation by: | ( | X | + | 4000 | ) |
| X | = | 3780 | ÷ | 4190 | × | ( | X | + | 4000 | ) |
| X | = | 3780 | ÷ | 4190 | × | X | + | 3780 | ÷ | 4190 | × | 4000 |
| X | = | 378 419 | X | + | 1512000 419 |
| X | − | 378 419 | X | = | 1512000 419 |
41 419 | X | = | 1512000 419 |
| X | = | 1512000 419 | ÷ | 41 419 |
| = | 1512000 419 | × | 419 41 |
| X | = | 633528000 17179 |
| X | = | 36878.04878 |