Finding the Fourth Proportional to 3,986.19, 5,500.85 and 2,217.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,986.19 : 5,500.85 = 2,217.83 : x
2. Step 2: Convert to fraction form
   3,986.19/5,500.85 = 2,217.83/x
3. Step 3: Cross multiply
   3,986.19x = 5,500.85 × 2,217.83
4. Step 4: Simplify right side
   3,986.19x = 12,199,911.56
5. Step 5: Solve for x
   x = 12,199,911.56/3,986.19
6. Step 6: Final answer
   x = 3,060.54