Finding the Fourth Proportional to 3,985.73, 5,500.17 and 2,217.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.73 : 5,500.17 = 2,217.30 : x
2. Step 2: Convert to fraction form
   3,985.73/5,500.17 = 2,217.30/x
3. Step 3: Cross multiply
   3,985.73x = 5,500.17 × 2,217.30
4. Step 4: Simplify right side
   3,985.73x = 12,195,526.94
5. Step 5: Solve for x
   x = 12,195,526.94/3,985.73
6. Step 6: Final answer
   x = 3,059.80