Finding the Fourth Proportional to 111,008.32, 153,209.61 and 82,517.20

Step by Step Solution

1. Step 1: Write the proportion equation
   111,008.32 : 153,209.61 = 82,517.20 : x
2. Step 2: Convert to fraction form
   111,008.32/153,209.61 = 82,517.20/x
3. Step 3: Cross multiply
   111,008.32x = 153,209.61 × 82,517.20
4. Step 4: Simplify right side
   111,008.32x = 12,642,428,030.29
5. Step 5: Solve for x
   x = 12,642,428,030.29/111,008.32
6. Step 6: Final answer
   x = 113,887.21