Finding the Fourth Proportional to 2,610.42, 3,912.12 and 965.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,610.42 : 3,912.12 = 965.40 : x
2. Step 2: Convert to fraction form
   2,610.42/3,912.12 = 965.40/x
3. Step 3: Cross multiply
   2,610.42x = 3,912.12 × 965.40
4. Step 4: Simplify right side
   2,610.42x = 3,776,760.65
5. Step 5: Solve for x
   x = 3,776,760.65/2,610.42
6. Step 6: Final answer
   x = 1,446.80