Finding the Fourth Proportional to 1,382.98, 1,908.86 and 963.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,382.98 : 1,908.86 = 963.40 : x
2. Step 2: Convert to fraction form
   1,382.98/1,908.86 = 963.40/x
3. Step 3: Cross multiply
   1,382.98x = 1,908.86 × 963.40
4. Step 4: Simplify right side
   1,382.98x = 1,838,995.72
5. Step 5: Solve for x
   x = 1,838,995.72/1,382.98
6. Step 6: Final answer
   x = 1,329.73