Finding the Fourth Proportional to 8,223.12, 12,310.38 and 7,761.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,223.12 : 12,310.38 = 7,761.42 : x
2. Step 2: Convert to fraction form
   8,223.12/12,310.38 = 7,761.42/x
3. Step 3: Cross multiply
   8,223.12x = 12,310.38 × 7,761.42
4. Step 4: Simplify right side
   8,223.12x = 95,546,029.54
5. Step 5: Solve for x
   x = 95,546,029.54/8,223.12
6. Step 6: Final answer
   x = 11,619.19