Finding the Fourth Proportional to 3,984.96, 5,499.06 and 2,216.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.96 : 5,499.06 = 2,216.55 : x
2. Step 2: Convert to fraction form
   3,984.96/5,499.06 = 2,216.55/x
3. Step 3: Cross multiply
   3,984.96x = 5,499.06 × 2,216.55
4. Step 4: Simplify right side
   3,984.96x = 12,188,941.44
5. Step 5: Solve for x
   x = 12,188,941.44/3,984.96
6. Step 6: Final answer
   x = 3,058.74