Finding the Fourth Proportional to 8,209.30, 12,311.29 and 2,661.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,209.30 : 12,311.29 = 2,661.46 : x
2. Step 2: Convert to fraction form
   8,209.30/12,311.29 = 2,661.46/x
3. Step 3: Cross multiply
   8,209.30x = 12,311.29 × 2,661.46
4. Step 4: Simplify right side
   8,209.30x = 32,765,978.43
5. Step 5: Solve for x
   x = 32,765,978.43/8,209.30
6. Step 6: Final answer
   x = 3,991.32