Finding the Fourth Proportional to 64,142.39, 88,541.16 and 57,416.15

Step by Step Solution

1. Step 1: Write the proportion equation
   64,142.39 : 88,541.16 = 57,416.15 : x
2. Step 2: Convert to fraction form
   64,142.39/88,541.16 = 57,416.15/x
3. Step 3: Cross multiply
   64,142.39x = 88,541.16 × 57,416.15
4. Step 4: Simplify right side
   64,142.39x = 5,083,692,523.73
5. Step 5: Solve for x
   x = 5,083,692,523.73/64,142.39
6. Step 6: Final answer
   x = 79,256.36