Finding the Fourth Proportional to 113,441.50, 156,549.27 and 63,139.42

Step by Step Solution

1. Step 1: Write the proportion equation
   113,441.50 : 156,549.27 = 63,139.42 : x
2. Step 2: Convert to fraction form
   113,441.50/156,549.27 = 63,139.42/x
3. Step 3: Cross multiply
   113,441.50x = 156,549.27 × 63,139.42
4. Step 4: Simplify right side
   113,441.50x = 9,884,430,109.22
5. Step 5: Solve for x
   x = 9,884,430,109.22/113,441.50
6. Step 6: Final answer
   x = 87,132.40