Finding the Fourth Proportional to 3,984.95, 5,499.21 and 2,216.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.95 : 5,499.21 = 2,216.72 : x
2. Step 2: Convert to fraction form
   3,984.95/5,499.21 = 2,216.72/x
3. Step 3: Cross multiply
   3,984.95x = 5,499.21 × 2,216.72
4. Step 4: Simplify right side
   3,984.95x = 12,190,181.30
5. Step 5: Solve for x
   x = 12,190,181.30/3,984.95
6. Step 6: Final answer
   x = 3,059.06