Finding the Fourth Proportional to 82,688.72, 113,979.42 and 75,824.12

Step by Step Solution

1. Step 1: Write the proportion equation
   82,688.72 : 113,979.42 = 75,824.12 : x
2. Step 2: Convert to fraction form
   82,688.72/113,979.42 = 75,824.12/x
3. Step 3: Cross multiply
   82,688.72x = 113,979.42 × 75,824.12
4. Step 4: Simplify right side
   82,688.72x = 8,642,389,219.61
5. Step 5: Solve for x
   x = 8,642,389,219.61/82,688.72
6. Step 6: Final answer
   x = 104,517.15