Finding the Fourth Proportional to 80,620.48, 111,310.56 and 72,096.16

Step by Step Solution

1. Step 1: Write the proportion equation
   80,620.48 : 111,310.56 = 72,096.16 : x
2. Step 2: Convert to fraction form
   80,620.48/111,310.56 = 72,096.16/x
3. Step 3: Cross multiply
   80,620.48x = 111,310.56 × 72,096.16
4. Step 4: Simplify right side
   80,620.48x = 8,025,063,943.45
5. Step 5: Solve for x
   x = 8,025,063,943.45/80,620.48
6. Step 6: Final answer
   x = 99,541.26