Finding the Fourth Proportional to 91,116.15, 125,734.17 and 57,123.28

Step by Step Solution

1. Step 1: Write the proportion equation
   91,116.15 : 125,734.17 = 57,123.28 : x
2. Step 2: Convert to fraction form
   91,116.15/125,734.17 = 57,123.28/x
3. Step 3: Cross multiply
   91,116.15x = 125,734.17 × 57,123.28
4. Step 4: Simplify right side
   91,116.15x = 7,182,348,198.48
5. Step 5: Solve for x
   x = 7,182,348,198.48/91,116.15
6. Step 6: Final answer
   x = 78,826.29