Finding the Fourth Proportional to 8,222.48, 12,306.72 and 7,434.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,222.48 : 12,306.72 = 7,434.80 : x
2. Step 2: Convert to fraction form
   8,222.48/12,306.72 = 7,434.80/x
3. Step 3: Cross multiply
   8,222.48x = 12,306.72 × 7,434.80
4. Step 4: Simplify right side
   8,222.48x = 91,498,001.86
5. Step 5: Solve for x
   x = 91,498,001.86/8,222.48
6. Step 6: Final answer
   x = 11,127.79