Finding the Fourth Proportional to 2,644.92, 3,970.62 and 2,540.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.92 : 3,970.62 = 2,540.52 : x
2. Step 2: Convert to fraction form
   2,644.92/3,970.62 = 2,540.52/x
3. Step 3: Cross multiply
   2,644.92x = 3,970.62 × 2,540.52
4. Step 4: Simplify right side
   2,644.92x = 10,087,439.52
5. Step 5: Solve for x
   x = 10,087,439.52/2,644.92
6. Step 6: Final answer
   x = 3,813.89