Finding the Fourth Proportional to 22,142.43, 33,213.60 and 8,991.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,142.43 : 33,213.60 = 8,991.72 : x
2. Step 2: Convert to fraction form
   22,142.43/33,213.60 = 8,991.72/x
3. Step 3: Cross multiply
   22,142.43x = 33,213.60 × 8,991.72
4. Step 4: Simplify right side
   22,142.43x = 298,647,391.39
5. Step 5: Solve for x
   x = 298,647,391.39/22,142.43
6. Step 6: Final answer
   x = 13,487.56