Finding the Fourth Proportional to 20,588.98, 28,398.18 and 17,431.47

Step by Step Solution

1. Step 1: Write the proportion equation
   20,588.98 : 28,398.18 = 17,431.47 : x
2. Step 2: Convert to fraction form
   20,588.98/28,398.18 = 17,431.47/x
3. Step 3: Cross multiply
   20,588.98x = 28,398.18 × 17,431.47
4. Step 4: Simplify right side
   20,588.98x = 495,022,022.72
5. Step 5: Solve for x
   x = 495,022,022.72/20,588.98
6. Step 6: Final answer
   x = 24,043.06