Finding the Fourth Proportional to 31,817.50, 43,908.15 and 18,569.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,817.50 : 43,908.15 = 18,569.50 : x
2. Step 2: Convert to fraction form
   31,817.50/43,908.15 = 18,569.50/x
3. Step 3: Cross multiply
   31,817.50x = 43,908.15 × 18,569.50
4. Step 4: Simplify right side
   31,817.50x = 815,352,391.43
5. Step 5: Solve for x
   x = 815,352,391.43/31,817.50
6. Step 6: Final answer
   x = 25,625.91