Finding the Fourth Proportional to 90,496.96, 124,959.18 and 56,545

Step by Step Solution

1. Step 1: Write the proportion equation
   90,496.96 : 124,959.18 = 56,545 : x
2. Step 2: Convert to fraction form
   90,496.96/124,959.18 = 56,545/x
3. Step 3: Cross multiply
   90,496.96x = 124,959.18 × 56,545
4. Step 4: Simplify right side
   90,496.96x = 7,065,816,833.10
5. Step 5: Solve for x
   x = 7,065,816,833.10/90,496.96
6. Step 6: Final answer
   x = 78,077.95