Finding the Fourth Proportional to 1,156,658.57, 1,596,238.71 and 640,412.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,156,658.57 : 1,596,238.71 = 640,412.46 : x
2. Step 2: Convert to fraction form
   1,156,658.57/1,596,238.71 = 640,412.46/x
3. Step 3: Cross multiply
   1,156,658.57x = 1,596,238.71 × 640,412.46
4. Step 4: Simplify right side
   1,156,658.57x = 1,022,251,159,018.33
5. Step 5: Solve for x
   x = 1,022,251,159,018.33/1,156,658.57
6. Step 6: Final answer
   x = 883,796.81