Finding the Fourth Proportional to 113,436.27, 156,524.69 and 65,680.40

Step by Step Solution

1. Step 1: Write the proportion equation
   113,436.27 : 156,524.69 = 65,680.40 : x
2. Step 2: Convert to fraction form
   113,436.27/156,524.69 = 65,680.40/x
3. Step 3: Cross multiply
   113,436.27x = 156,524.69 × 65,680.40
4. Step 4: Simplify right side
   113,436.27x = 10,280,604,804.59
5. Step 5: Solve for x
   x = 10,280,604,804.59/113,436.27
6. Step 6: Final answer
   x = 90,628.90