Finding the Fourth Proportional to 113,561.10, 156,717.88 and 65,171.88

Step by Step Solution

1. Step 1: Write the proportion equation
   113,561.10 : 156,717.88 = 65,171.88 : x
2. Step 2: Convert to fraction form
   113,561.10/156,717.88 = 65,171.88/x
3. Step 3: Cross multiply
   113,561.10x = 156,717.88 × 65,171.88
4. Step 4: Simplify right side
   113,561.10x = 10,213,598,706.28
5. Step 5: Solve for x
   x = 10,213,598,706.28/113,561.10
6. Step 6: Final answer
   x = 89,939.24