Finding the Fourth Proportional to 9,327.42, 13,922.89 and 8,220.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,327.42 : 13,922.89 = 8,220.29 : x
2. Step 2: Convert to fraction form
   9,327.42/13,922.89 = 8,220.29/x
3. Step 3: Cross multiply
   9,327.42x = 13,922.89 × 8,220.29
4. Step 4: Simplify right side
   9,327.42x = 114,450,103.27
5. Step 5: Solve for x
   x = 114,450,103.27/9,327.42
6. Step 6: Final answer
   x = 12,270.29