Finding the Fourth Proportional to 1,375.31, 2,057.81 and 965.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,375.31 : 2,057.81 = 965.25 : x
2. Step 2: Convert to fraction form
   1,375.31/2,057.81 = 965.25/x
3. Step 3: Cross multiply
   1,375.31x = 2,057.81 × 965.25
4. Step 4: Simplify right side
   1,375.31x = 1,986,296.28
5. Step 5: Solve for x
   x = 1,986,296.28/1,375.31
6. Step 6: Final answer
   x = 1,444.25