Finding the Fourth Proportional to 3,985.46, 5,499.86 and 2,217.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.46 : 5,499.86 = 2,217.05 : x
2. Step 2: Convert to fraction form
   3,985.46/5,499.86 = 2,217.05/x
3. Step 3: Cross multiply
   3,985.46x = 5,499.86 × 2,217.05
4. Step 4: Simplify right side
   3,985.46x = 12,193,426.03
5. Step 5: Solve for x
   x = 12,193,426.03/3,985.46
6. Step 6: Final answer
   x = 3,059.48