Finding the Fourth Proportional to 3,984.80, 5,498.16 and 2,216.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.80 : 5,498.16 = 2,216.30 : x
2. Step 2: Convert to fraction form
   3,984.80/5,498.16 = 2,216.30/x
3. Step 3: Cross multiply
   3,984.80x = 5,498.16 × 2,216.30
4. Step 4: Simplify right side
   3,984.80x = 12,185,572.01
5. Step 5: Solve for x
   x = 12,185,572.01/3,984.80
6. Step 6: Final answer
   x = 3,058.01