Finding the Fourth Proportional to 2,540.88, 3,809.12 and 1,081.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,540.88 : 3,809.12 = 1,081.08 : x
2. Step 2: Convert to fraction form
   2,540.88/3,809.12 = 1,081.08/x
3. Step 3: Cross multiply
   2,540.88x = 3,809.12 × 1,081.08
4. Step 4: Simplify right side
   2,540.88x = 4,117,958.04
5. Step 5: Solve for x
   x = 4,117,958.04/2,540.88
6. Step 6: Final answer
   x = 1,620.68