Finding the Fourth Proportional to 22,805.50, 31,472.21 and 12,734.37

Step by Step Solution

1. Step 1: Write the proportion equation
   22,805.50 : 31,472.21 = 12,734.37 : x
2. Step 2: Convert to fraction form
   22,805.50/31,472.21 = 12,734.37/x
3. Step 3: Cross multiply
   22,805.50x = 31,472.21 × 12,734.37
4. Step 4: Simplify right side
   22,805.50x = 400,778,766.86
5. Step 5: Solve for x
   x = 400,778,766.86/22,805.50
6. Step 6: Final answer
   x = 17,573.78