Finding the Fourth Proportional to 1,200,407.94, 1,656,501.03 and 656,437.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,200,407.94 : 1,656,501.03 = 656,437.86 : x
2. Step 2: Convert to fraction form
   1,200,407.94/1,656,501.03 = 656,437.86/x
3. Step 3: Cross multiply
   1,200,407.94x = 1,656,501.03 × 656,437.86
4. Step 4: Simplify right side
   1,200,407.94x = 1,087,389,991,221.00
5. Step 5: Solve for x
   x = 1,087,389,991,221.00/1,200,407.94
6. Step 6: Final answer
   x = 905,850.38