Finding the Fourth Proportional to 2,642.30, 3,960.36 and 1,325.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,642.30 : 3,960.36 = 1,325.34 : x
2. Step 2: Convert to fraction form
   2,642.30/3,960.36 = 1,325.34/x
3. Step 3: Cross multiply
   2,642.30x = 3,960.36 × 1,325.34
4. Step 4: Simplify right side
   2,642.30x = 5,248,823.52
5. Step 5: Solve for x
   x = 5,248,823.52/2,642.30
6. Step 6: Final answer
   x = 1,986.46