Finding the Fourth Proportional to 2,257.76, 3,384.72 and 960.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,257.76 : 3,384.72 = 960.16 : x
2. Step 2: Convert to fraction form
   2,257.76/3,384.72 = 960.16/x
3. Step 3: Cross multiply
   2,257.76x = 3,384.72 × 960.16
4. Step 4: Simplify right side
   2,257.76x = 3,249,872.76
5. Step 5: Solve for x
   x = 3,249,872.76/2,257.76
6. Step 6: Final answer
   x = 1,439.42