Finding the Fourth Proportional to 2,572.38, 3,862.89 and 2,440.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.38 : 3,862.89 = 2,440.86 : x
2. Step 2: Convert to fraction form
   2,572.38/3,862.89 = 2,440.86/x
3. Step 3: Cross multiply
   2,572.38x = 3,862.89 × 2,440.86
4. Step 4: Simplify right side
   2,572.38x = 9,428,773.69
5. Step 5: Solve for x
   x = 9,428,773.69/2,572.38
6. Step 6: Final answer
   x = 3,665.39