Finding the Fourth Proportional to 1,441.28, 2,162.46 and 864.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,441.28 : 2,162.46 = 864.56 : x
2. Step 2: Convert to fraction form
   1,441.28/2,162.46 = 864.56/x
3. Step 3: Cross multiply
   1,441.28x = 2,162.46 × 864.56
4. Step 4: Simplify right side
   1,441.28x = 1,869,576.42
5. Step 5: Solve for x
   x = 1,869,576.42/1,441.28
6. Step 6: Final answer
   x = 1,297.16