Finding the Fourth Proportional to 8,061.20, 12,090.38 and 2,216.40

Step by Step Solution

1. Step 1: Write the proportion equation
   8,061.20 : 12,090.38 = 2,216.40 : x
2. Step 2: Convert to fraction form
   8,061.20/12,090.38 = 2,216.40/x
3. Step 3: Cross multiply
   8,061.20x = 12,090.38 × 2,216.40
4. Step 4: Simplify right side
   8,061.20x = 26,797,118.23
5. Step 5: Solve for x
   x = 26,797,118.23/8,061.20
6. Step 6: Final answer
   x = 3,324.21