Finding the Fourth Proportional to 1,067.22, 1,596.78 and 959.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,067.22 : 1,596.78 = 959.31 : x
2. Step 2: Convert to fraction form
   1,067.22/1,596.78 = 959.31/x
3. Step 3: Cross multiply
   1,067.22x = 1,596.78 × 959.31
4. Step 4: Simplify right side
   1,067.22x = 1,531,807.02
5. Step 5: Solve for x
   x = 1,531,807.02/1,067.22
6. Step 6: Final answer
   x = 1,435.32