Finding the Fourth Proportional to 113,440.50, 156,547.89 and 63,138.42

Step by Step Solution

1. Step 1: Write the proportion equation
   113,440.50 : 156,547.89 = 63,138.42 : x
2. Step 2: Convert to fraction form
   113,440.50/156,547.89 = 63,138.42/x
3. Step 3: Cross multiply
   113,440.50x = 156,547.89 × 63,138.42
4. Step 4: Simplify right side
   113,440.50x = 9,884,186,428.93
5. Step 5: Solve for x
   x = 9,884,186,428.93/113,440.50
6. Step 6: Final answer
   x = 87,131.02