Finding the Fourth Proportional to 2,641.78, 3,964.04 and 1,343.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.78 : 3,964.04 = 1,343.25 : x
2. Step 2: Convert to fraction form
   2,641.78/3,964.04 = 1,343.25/x
3. Step 3: Cross multiply
   2,641.78x = 3,964.04 × 1,343.25
4. Step 4: Simplify right side
   2,641.78x = 5,324,695.05
5. Step 5: Solve for x
   x = 5,324,695.05/2,641.78
6. Step 6: Final answer
   x = 2,015.57