Finding the Fourth Proportional to 3,984.27, 5,498.22 and 2,215.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.27 : 5,498.22 = 2,215.84 : x
2. Step 2: Convert to fraction form
   3,984.27/5,498.22 = 2,215.84/x
3. Step 3: Cross multiply
   3,984.27x = 5,498.22 × 2,215.84
4. Step 4: Simplify right side
   3,984.27x = 12,183,160.62
5. Step 5: Solve for x
   x = 12,183,160.62/3,984.27
6. Step 6: Final answer
   x = 3,057.81