Finding the Fourth Proportional to 42,128.75, 58,137.96 and 23,008.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,128.75 : 58,137.96 = 23,008.04 : x
2. Step 2: Convert to fraction form
   42,128.75/58,137.96 = 23,008.04/x
3. Step 3: Cross multiply
   42,128.75x = 58,137.96 × 23,008.04
4. Step 4: Simplify right side
   42,128.75x = 1,337,640,509.20
5. Step 5: Solve for x
   x = 1,337,640,509.20/42,128.75
6. Step 6: Final answer
   x = 31,751.25