Finding the Fourth Proportional to 139,854.72, 193,022.92 and 82,508.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,854.72 : 193,022.92 = 82,508.28 : x
2. Step 2: Convert to fraction form
   139,854.72/193,022.92 = 82,508.28/x
3. Step 3: Cross multiply
   139,854.72x = 193,022.92 × 82,508.28
4. Step 4: Simplify right side
   139,854.72x = 15,925,989,129.78
5. Step 5: Solve for x
   x = 15,925,989,129.78/139,854.72
6. Step 6: Final answer
   x = 113,875.24