Finding the Fourth Proportional to 22,677.39, 31,287.33 and 13,721.49

Step by Step Solution

1. Step 1: Write the proportion equation
   22,677.39 : 31,287.33 = 13,721.49 : x
2. Step 2: Convert to fraction form
   22,677.39/31,287.33 = 13,721.49/x
3. Step 3: Cross multiply
   22,677.39x = 31,287.33 × 13,721.49
4. Step 4: Simplify right side
   22,677.39x = 429,308,785.72
5. Step 5: Solve for x
   x = 429,308,785.72/22,677.39
6. Step 6: Final answer
   x = 18,931.14