Finding the Fourth Proportional to 3,986.27, 5,501.05 and 2,217.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.27 : 5,501.05 = 2,217.88 : x
2. Step 2: Convert to fraction form
   3,986.27/5,501.05 = 2,217.88/x
3. Step 3: Cross multiply
   3,986.27x = 5,501.05 × 2,217.88
4. Step 4: Simplify right side
   3,986.27x = 12,200,641.27
5. Step 5: Solve for x
   x = 12,200,641.27/3,986.27
6. Step 6: Final answer
   x = 3,060.67