Finding the Fourth Proportional to 22,131.72, 33,178.14 and 8,290.44

Step by Step Solution

1. Step 1: Write the proportion equation
   22,131.72 : 33,178.14 = 8,290.44 : x
2. Step 2: Convert to fraction form
   22,131.72/33,178.14 = 8,290.44/x
3. Step 3: Cross multiply
   22,131.72x = 33,178.14 × 8,290.44
4. Step 4: Simplify right side
   22,131.72x = 275,061,378.98
5. Step 5: Solve for x
   x = 275,061,378.98/22,131.72
6. Step 6: Final answer
   x = 12,428.38