Finding the Fourth Proportional to 3,985.56, 5,500.10 and 2,217.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.56 : 5,500.10 = 2,217.24 : x
2. Step 2: Convert to fraction form
   3,985.56/5,500.10 = 2,217.24/x
3. Step 3: Cross multiply
   3,985.56x = 5,500.10 × 2,217.24
4. Step 4: Simplify right side
   3,985.56x = 12,195,041.72
5. Step 5: Solve for x
   x = 12,195,041.72/3,985.56
6. Step 6: Final answer
   x = 3,059.81