Finding the Fourth Proportional to 3,984.12, 5,498.06 and 2,215.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.12 : 5,498.06 = 2,215.72 : x
2. Step 2: Convert to fraction form
   3,984.12/5,498.06 = 2,215.72/x
3. Step 3: Cross multiply
   3,984.12x = 5,498.06 × 2,215.72
4. Step 4: Simplify right side
   3,984.12x = 12,182,161.50
5. Step 5: Solve for x
   x = 12,182,161.50/3,984.12
6. Step 6: Final answer
   x = 3,057.68