Finding the Fourth Proportional to 8,221.16, 12,331.78 and 2,674.42

Step by Step Solution

1. Step 1: Write the proportion equation
   8,221.16 : 12,331.78 = 2,674.42 : x
2. Step 2: Convert to fraction form
   8,221.16/12,331.78 = 2,674.42/x
3. Step 3: Cross multiply
   8,221.16x = 12,331.78 × 2,674.42
4. Step 4: Simplify right side
   8,221.16x = 32,980,321.55
5. Step 5: Solve for x
   x = 32,980,321.55/8,221.16
6. Step 6: Final answer
   x = 4,011.64