Finding the Fourth Proportional to 91,111.43, 125,792.31 and 57,166.49

Step by Step Solution

1. Step 1: Write the proportion equation
   91,111.43 : 125,792.31 = 57,166.49 : x
2. Step 2: Convert to fraction form
   91,111.43/125,792.31 = 57,166.49/x
3. Step 3: Cross multiply
   91,111.43x = 125,792.31 × 57,166.49
4. Step 4: Simplify right side
   91,111.43x = 7,191,104,831.69
5. Step 5: Solve for x
   x = 7,191,104,831.69/91,111.43
6. Step 6: Final answer
   x = 78,926.48