Finding the Fourth Proportional to 3,984.54, 5,499.09 and 2,216.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.54 : 5,499.09 = 2,216.31 : x
2. Step 2: Convert to fraction form
   3,984.54/5,499.09 = 2,216.31/x
3. Step 3: Cross multiply
   3,984.54x = 5,499.09 × 2,216.31
4. Step 4: Simplify right side
   3,984.54x = 12,187,688.16
5. Step 5: Solve for x
   x = 12,187,688.16/3,984.54
6. Step 6: Final answer
   x = 3,058.74