Finding the Fourth Proportional to 113,416.50, 156,514.86 and 65,672.40

Step by Step Solution

1. Step 1: Write the proportion equation
   113,416.50 : 156,514.86 = 65,672.40 : x
2. Step 2: Convert to fraction form
   113,416.50/156,514.86 = 65,672.40/x
3. Step 3: Cross multiply
   113,416.50x = 156,514.86 × 65,672.40
4. Step 4: Simplify right side
   113,416.50x = 10,278,706,491.86
5. Step 5: Solve for x
   x = 10,278,706,491.86/113,416.50
6. Step 6: Final answer
   x = 90,627.96