Finding the Fourth Proportional to 1,162,694.88, 1,604,537.59 and 639,426.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,162,694.88 : 1,604,537.59 = 639,426.17 : x
2. Step 2: Convert to fraction form
   1,162,694.88/1,604,537.59 = 639,426.17/x
3. Step 3: Cross multiply
   1,162,694.88x = 1,604,537.59 × 639,426.17
4. Step 4: Simplify right side
   1,162,694.88x = 1,025,983,314,574.91
5. Step 5: Solve for x
   x = 1,025,983,314,574.91/1,162,694.88
6. Step 6: Final answer
   x = 882,418.37