Finding the Fourth Proportional to 2,645.18, 3,960.42 and 1,340.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,645.18 : 3,960.42 = 1,340.24 : x
2. Step 2: Convert to fraction form
   2,645.18/3,960.42 = 1,340.24/x
3. Step 3: Cross multiply
   2,645.18x = 3,960.42 × 1,340.24
4. Step 4: Simplify right side
   2,645.18x = 5,307,913.30
5. Step 5: Solve for x
   x = 5,307,913.30/2,645.18
6. Step 6: Final answer
   x = 2,006.64