Finding the Fourth Proportional to 3,984.57, 5,498.68 and 2,216.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.57 : 5,498.68 = 2,216.17 : x
2. Step 2: Convert to fraction form
   3,984.57/5,498.68 = 2,216.17/x
3. Step 3: Cross multiply
   3,984.57x = 5,498.68 × 2,216.17
4. Step 4: Simplify right side
   3,984.57x = 12,186,009.66
5. Step 5: Solve for x
   x = 12,186,009.66/3,984.57
6. Step 6: Final answer
   x = 3,058.30