Finding the Fourth Proportional to 42,002.10, 57,962.25 and 23,139.90

Step by Step Solution

1. Step 1: Write the proportion equation
   42,002.10 : 57,962.25 = 23,139.90 : x
2. Step 2: Convert to fraction form
   42,002.10/57,962.25 = 23,139.90/x
3. Step 3: Cross multiply
   42,002.10x = 57,962.25 × 23,139.90
4. Step 4: Simplify right side
   42,002.10x = 1,341,240,668.78
5. Step 5: Solve for x
   x = 1,341,240,668.78/42,002.10
6. Step 6: Final answer
   x = 31,932.71