Finding the Fourth Proportional to 115,118.52, 158,861.17 and 64,131.18

Step by Step Solution

1. Step 1: Write the proportion equation
   115,118.52 : 158,861.17 = 64,131.18 : x
2. Step 2: Convert to fraction form
   115,118.52/158,861.17 = 64,131.18/x
3. Step 3: Cross multiply
   115,118.52x = 158,861.17 × 64,131.18
4. Step 4: Simplify right side
   115,118.52x = 10,187,954,525.11
5. Step 5: Solve for x
   x = 10,187,954,525.11/115,118.52
6. Step 6: Final answer
   x = 88,499.70