Finding the Fourth Proportional to 31,149.96, 42,987.68 and 17,002.90

Step by Step Solution

1. Step 1: Write the proportion equation
   31,149.96 : 42,987.68 = 17,002.90 : x
2. Step 2: Convert to fraction form
   31,149.96/42,987.68 = 17,002.90/x
3. Step 3: Cross multiply
   31,149.96x = 42,987.68 × 17,002.90
4. Step 4: Simplify right side
   31,149.96x = 730,915,224.27
5. Step 5: Solve for x
   x = 730,915,224.27/31,149.96
6. Step 6: Final answer
   x = 23,464.40