Finding the Fourth Proportional to 2,610.56, 3,906.08 and 2,581.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.56 : 3,906.08 = 2,581.40 : x
2. Step 2: Convert to fraction form
   2,610.56/3,906.08 = 2,581.40/x
3. Step 3: Cross multiply
   2,610.56x = 3,906.08 × 2,581.40
4. Step 4: Simplify right side
   2,610.56x = 10,083,154.91
5. Step 5: Solve for x
   x = 10,083,154.91/2,610.56
6. Step 6: Final answer
   x = 3,862.45