Finding the Fourth Proportional to 108,520.10, 162,780.15 and 91,024.10

Step by Step Solution

1. Step 1: Write the proportion equation
   108,520.10 : 162,780.15 = 91,024.10 : x
2. Step 2: Convert to fraction form
   108,520.10/162,780.15 = 91,024.10/x
3. Step 3: Cross multiply
   108,520.10x = 162,780.15 × 91,024.10
4. Step 4: Simplify right side
   108,520.10x = 14,816,916,651.62
5. Step 5: Solve for x
   x = 14,816,916,651.62/108,520.10
6. Step 6: Final answer
   x = 136,536.15