Finding the Fourth Proportional to 105,264.24, 145,258.56 and 57,517.98

Step by Step Solution

1. Step 1: Write the proportion equation
   105,264.24 : 145,258.56 = 57,517.98 : x
2. Step 2: Convert to fraction form
   105,264.24/145,258.56 = 57,517.98/x
3. Step 3: Cross multiply
   105,264.24x = 145,258.56 × 57,517.98
4. Step 4: Simplify right side
   105,264.24x = 8,354,978,948.91
5. Step 5: Solve for x
   x = 8,354,978,948.91/105,264.24
6. Step 6: Final answer
   x = 79,371.48