Finding the Fourth Proportional to 3,984.96, 5,499.20 and 2,216.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.96 : 5,499.20 = 2,216.72 : x
2. Step 2: Convert to fraction form
   3,984.96/5,499.20 = 2,216.72/x
3. Step 3: Cross multiply
   3,984.96x = 5,499.20 × 2,216.72
4. Step 4: Simplify right side
   3,984.96x = 12,190,186.62
5. Step 5: Solve for x
   x = 12,190,186.62/3,984.96
6. Step 6: Final answer
   x = 3,059.05