Finding the Fourth Proportional to 113,532.76, 156,651.24 and 65,783.20

Step by Step Solution

1. Step 1: Write the proportion equation
   113,532.76 : 156,651.24 = 65,783.20 : x
2. Step 2: Convert to fraction form
   113,532.76/156,651.24 = 65,783.20/x
3. Step 3: Cross multiply
   113,532.76x = 156,651.24 × 65,783.20
4. Step 4: Simplify right side
   113,532.76x = 10,305,019,851.17
5. Step 5: Solve for x
   x = 10,305,019,851.17/113,532.76
6. Step 6: Final answer
   x = 90,766.93