Finding the Fourth Proportional to 3,985.59, 5,500.79 and 2,306.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.59 : 5,500.79 = 2,306.71 : x
2. Step 2: Convert to fraction form
   3,985.59/5,500.79 = 2,306.71/x
3. Step 3: Cross multiply
   3,985.59x = 5,500.79 × 2,306.71
4. Step 4: Simplify right side
   3,985.59x = 12,688,727.30
5. Step 5: Solve for x
   x = 12,688,727.30/3,985.59
6. Step 6: Final answer
   x = 3,183.65