Finding the Fourth Proportional to 22,685.86, 31,306.61 and 13,731.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,685.86 : 31,306.61 = 13,731.12 : x
2. Step 2: Convert to fraction form
   22,685.86/31,306.61 = 13,731.12/x
3. Step 3: Cross multiply
   22,685.86x = 31,306.61 × 13,731.12
4. Step 4: Simplify right side
   22,685.86x = 429,874,818.70
5. Step 5: Solve for x
   x = 429,874,818.70/22,685.86
6. Step 6: Final answer
   x = 18,949.02