Finding the Fourth Proportional to 3,900.57, 5,382.89 and 2,329.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,900.57 : 5,382.89 = 2,329.57 : x
2. Step 2: Convert to fraction form
   3,900.57/5,382.89 = 2,329.57/x
3. Step 3: Cross multiply
   3,900.57x = 5,382.89 × 2,329.57
4. Step 4: Simplify right side
   3,900.57x = 12,539,819.06
5. Step 5: Solve for x
   x = 12,539,819.06/3,900.57
6. Step 6: Final answer
   x = 3,214.87