Finding the Fourth Proportional to 1,721.67, 2,375.89 and 935.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.67 : 2,375.89 = 935.73 : x
2. Step 2: Convert to fraction form
   1,721.67/2,375.89 = 935.73/x
3. Step 3: Cross multiply
   1,721.67x = 2,375.89 × 935.73
4. Step 4: Simplify right side
   1,721.67x = 2,223,191.55
5. Step 5: Solve for x
   x = 2,223,191.55/1,721.67
6. Step 6: Final answer
   x = 1,291.30