Finding the Fourth Proportional to 8,327.86, 12,399.34 and 8,211.62

Step by Step Solution

1. Step 1: Write the proportion equation
   8,327.86 : 12,399.34 = 8,211.62 : x
2. Step 2: Convert to fraction form
   8,327.86/12,399.34 = 8,211.62/x
3. Step 3: Cross multiply
   8,327.86x = 12,399.34 × 8,211.62
4. Step 4: Simplify right side
   8,327.86x = 101,818,668.33
5. Step 5: Solve for x
   x = 101,818,668.33/8,327.86
6. Step 6: Final answer
   x = 12,226.27