Finding the Fourth Proportional to 64,142.62, 88,541.51 and 57,416.38

Step by Step Solution

1. Step 1: Write the proportion equation
   64,142.62 : 88,541.51 = 57,416.38 : x
2. Step 2: Convert to fraction form
   64,142.62/88,541.51 = 57,416.38/x
3. Step 3: Cross multiply
   64,142.62x = 88,541.51 × 57,416.38
4. Step 4: Simplify right side
   64,142.62x = 5,083,732,475.50
5. Step 5: Solve for x
   x = 5,083,732,475.50/64,142.62
6. Step 6: Final answer
   x = 79,256.70