Finding the Fourth Proportional to 3,986.16, 5,500.92 and 2,217.93

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.16 : 5,500.92 = 2,217.93 : x
2. Step 2: Convert to fraction form
   3,986.16/5,500.92 = 2,217.93/x
3. Step 3: Cross multiply
   3,986.16x = 5,500.92 × 2,217.93
4. Step 4: Simplify right side
   3,986.16x = 12,200,655.50
5. Step 5: Solve for x
   x = 12,200,655.50/3,986.16
6. Step 6: Final answer
   x = 3,060.75