Finding the Fourth Proportional to 1,425.62, 1,966.29 and 959.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,425.62 : 1,966.29 = 959.78 : x
2. Step 2: Convert to fraction form
   1,425.62/1,966.29 = 959.78/x
3. Step 3: Cross multiply
   1,425.62x = 1,966.29 × 959.78
4. Step 4: Simplify right side
   1,425.62x = 1,887,205.82
5. Step 5: Solve for x
   x = 1,887,205.82/1,425.62
6. Step 6: Final answer
   x = 1,323.78