Finding the Fourth Proportional to 22,239.51, 30,687.86 and 13,285.27

Step by Step Solution

1. Step 1: Write the proportion equation
   22,239.51 : 30,687.86 = 13,285.27 : x
2. Step 2: Convert to fraction form
   22,239.51/30,687.86 = 13,285.27/x
3. Step 3: Cross multiply
   22,239.51x = 30,687.86 × 13,285.27
4. Step 4: Simplify right side
   22,239.51x = 407,696,404.78
5. Step 5: Solve for x
   x = 407,696,404.78/22,239.51
6. Step 6: Final answer
   x = 18,332.08