Finding the Fourth Proportional to 985,158.72, 1,359,491.88 and 555,435.12

Step by Step Solution

1. Step 1: Write the proportion equation
   985,158.72 : 1,359,491.88 = 555,435.12 : x
2. Step 2: Convert to fraction form
   985,158.72/1,359,491.88 = 555,435.12/x
3. Step 3: Cross multiply
   985,158.72x = 1,359,491.88 × 555,435.12
4. Step 4: Simplify right side
   985,158.72x = 755,109,535,506.83
5. Step 5: Solve for x
   x = 755,109,535,506.83/985,158.72
6. Step 6: Final answer
   x = 766,485.16