Finding the Fourth Proportional to 81,105.28, 112,002.29 and 76,687.54

Step by Step Solution

1. Step 1: Write the proportion equation
   81,105.28 : 112,002.29 = 76,687.54 : x
2. Step 2: Convert to fraction form
   81,105.28/112,002.29 = 76,687.54/x
3. Step 3: Cross multiply
   81,105.28x = 112,002.29 × 76,687.54
4. Step 4: Simplify right side
   81,105.28x = 8,589,180,094.47
5. Step 5: Solve for x
   x = 8,589,180,094.47/81,105.28
6. Step 6: Final answer
   x = 105,901.61