Finding the Fourth Proportional to 22,281.82, 30,747.72 and 12,721.33

Step by Step Solution

1. Step 1: Write the proportion equation
   22,281.82 : 30,747.72 = 12,721.33 : x
2. Step 2: Convert to fraction form
   22,281.82/30,747.72 = 12,721.33/x
3. Step 3: Cross multiply
   22,281.82x = 30,747.72 × 12,721.33
4. Step 4: Simplify right side
   22,281.82x = 391,151,892.87
5. Step 5: Solve for x
   x = 391,151,892.87/22,281.82
6. Step 6: Final answer
   x = 17,554.76