Finding the Fourth Proportional to 31,155.26, 42,993.65 and 17,008.20

Step by Step Solution

1. Step 1: Write the proportion equation
   31,155.26 : 42,993.65 = 17,008.20 : x
2. Step 2: Convert to fraction form
   31,155.26/42,993.65 = 17,008.20/x
3. Step 3: Cross multiply
   31,155.26x = 42,993.65 × 17,008.20
4. Step 4: Simplify right side
   31,155.26x = 731,244,640.45
5. Step 5: Solve for x
   x = 731,244,640.45/31,155.26
6. Step 6: Final answer
   x = 23,470.99