Finding the Fourth Proportional to 3,984.14, 5,498.34 and 2,215.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.14 : 5,498.34 = 2,215.91 : x
2. Step 2: Convert to fraction form
   3,984.14/5,498.34 = 2,215.91/x
3. Step 3: Cross multiply
   3,984.14x = 5,498.34 × 2,215.91
4. Step 4: Simplify right side
   3,984.14x = 12,183,826.59
5. Step 5: Solve for x
   x = 12,183,826.59/3,984.14
6. Step 6: Final answer
   x = 3,058.08