Finding the Fourth Proportional to 959.31, 1,322.33 and 678.69

Step by Step Solution

1. Step 1: Write the proportion equation
   959.31 : 1,322.33 = 678.69 : x
2. Step 2: Convert to fraction form
   959.31/1,322.33 = 678.69/x
3. Step 3: Cross multiply
   959.31x = 1,322.33 × 678.69
4. Step 4: Simplify right side
   959.31x = 897,448.75
5. Step 5: Solve for x
   x = 897,448.75/959.31
6. Step 6: Final answer
   x = 935.51