Finding the Fourth Proportional to 1,200,357.86, 1,656,470.57 and 656,491.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,357.86 : 1,656,470.57 = 656,491.92 : x
2. Step 2: Convert to fraction form
   1,200,357.86/1,656,470.57 = 656,491.92/x
3. Step 3: Cross multiply
   1,200,357.86x = 1,656,470.57 × 656,491.92
4. Step 4: Simplify right side
   1,200,357.86x = 1,087,459,541,640.33
5. Step 5: Solve for x
   x = 1,087,459,541,640.33/1,200,357.86
6. Step 6: Final answer
   x = 905,946.12