Finding the Fourth Proportional to 3,984.87, 5,499.32 and 2,216.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.87 : 5,499.32 = 2,216.45 : x
2. Step 2: Convert to fraction form
   3,984.87/5,499.32 = 2,216.45/x
3. Step 3: Cross multiply
   3,984.87x = 5,499.32 × 2,216.45
4. Step 4: Simplify right side
   3,984.87x = 12,188,929.24
5. Step 5: Solve for x
   x = 12,188,929.24/3,984.87
6. Step 6: Final answer
   x = 3,058.80