Finding the Fourth Proportional to 2,560.76, 3,841.92 and 1,329.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560.76 : 3,841.92 = 1,329.05 : x
2. Step 2: Convert to fraction form
   2,560.76/3,841.92 = 1,329.05/x
3. Step 3: Cross multiply
   2,560.76x = 3,841.92 × 1,329.05
4. Step 4: Simplify right side
   2,560.76x = 5,106,103.78
5. Step 5: Solve for x
   x = 5,106,103.78/2,560.76
6. Step 6: Final answer
   x = 1,993.98