Finding the Fourth Proportional to 3,985.92, 5,500.89 and 2,217.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.92 : 5,500.89 = 2,217.69 : x
2. Step 2: Convert to fraction form
   3,985.92/5,500.89 = 2,217.69/x
3. Step 3: Cross multiply
   3,985.92x = 5,500.89 × 2,217.69
4. Step 4: Simplify right side
   3,985.92x = 12,199,268.74
5. Step 5: Solve for x
   x = 12,199,268.74/3,985.92
6. Step 6: Final answer
   x = 3,060.59