Finding the Fourth Proportional to 2,275.56, 3,411.86 and 960.17

Step by Step Solution

1. Step 1: Write the proportion equation
   2,275.56 : 3,411.86 = 960.17 : x
2. Step 2: Convert to fraction form
   2,275.56/3,411.86 = 960.17/x
3. Step 3: Cross multiply
   2,275.56x = 3,411.86 × 960.17
4. Step 4: Simplify right side
   2,275.56x = 3,275,943.76
5. Step 5: Solve for x
   x = 3,275,943.76/2,275.56
6. Step 6: Final answer
   x = 1,439.62