Finding the Fourth Proportional to 3,984.52, 5,498.40 and 2,215.77

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.52 : 5,498.40 = 2,215.77 : x
2. Step 2: Convert to fraction form
   3,984.52/5,498.40 = 2,215.77/x
3. Step 3: Cross multiply
   3,984.52x = 5,498.40 × 2,215.77
4. Step 4: Simplify right side
   3,984.52x = 12,183,162.28
5. Step 5: Solve for x
   x = 12,183,162.28/3,984.52
6. Step 6: Final answer
   x = 3,057.63