Finding the Fourth Proportional to 2,560.32, 3,842.58 and 1,328.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560.32 : 3,842.58 = 1,328.10 : x
2. Step 2: Convert to fraction form
   2,560.32/3,842.58 = 1,328.10/x
3. Step 3: Cross multiply
   2,560.32x = 3,842.58 × 1,328.10
4. Step 4: Simplify right side
   2,560.32x = 5,103,330.50
5. Step 5: Solve for x
   x = 5,103,330.50/2,560.32
6. Step 6: Final answer
   x = 1,993.24