Finding the Fourth Proportional to 2,560.65, 3,842.17 and 1,327.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,560.65 : 3,842.17 = 1,327.39 : x
2. Step 2: Convert to fraction form
   2,560.65/3,842.17 = 1,327.39/x
3. Step 3: Cross multiply
   2,560.65x = 3,842.17 × 1,327.39
4. Step 4: Simplify right side
   2,560.65x = 5,100,038.83
5. Step 5: Solve for x
   x = 5,100,038.83/2,560.65
6. Step 6: Final answer
   x = 1,991.70