Finding the Fourth Proportional to 1,131.38, 1,689.62 and 965.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.38 : 1,689.62 = 965.06 : x
2. Step 2: Convert to fraction form
   1,131.38/1,689.62 = 965.06/x
3. Step 3: Cross multiply
   1,131.38x = 1,689.62 × 965.06
4. Step 4: Simplify right side
   1,131.38x = 1,630,584.68
5. Step 5: Solve for x
   x = 1,630,584.68/1,131.38
6. Step 6: Final answer
   x = 1,441.24