Finding the Fourth Proportional to 1,721.25, 2,375.33 and 935.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.25 : 2,375.33 = 935.31 : x
2. Step 2: Convert to fraction form
   1,721.25/2,375.33 = 935.31/x
3. Step 3: Cross multiply
   1,721.25x = 2,375.33 × 935.31
4. Step 4: Simplify right side
   1,721.25x = 2,221,674.13
5. Step 5: Solve for x
   x = 2,221,674.13/1,721.25
6. Step 6: Final answer
   x = 1,290.73