Finding the Fourth Proportional to 22,925.50, 31,637.67 and 12,989.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,925.50 : 31,637.67 = 12,989.50 : x
2. Step 2: Convert to fraction form
   22,925.50/31,637.67 = 12,989.50/x
3. Step 3: Cross multiply
   22,925.50x = 31,637.67 × 12,989.50
4. Step 4: Simplify right side
   22,925.50x = 410,957,514.47
5. Step 5: Solve for x
   x = 410,957,514.47/22,925.50
6. Step 6: Final answer
   x = 17,925.78