Finding the Fourth Proportional to 1,721.51, 2,375.61 and 935.54

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.51 : 2,375.61 = 935.54 : x
2. Step 2: Convert to fraction form
   1,721.51/2,375.61 = 935.54/x
3. Step 3: Cross multiply
   1,721.51x = 2,375.61 × 935.54
4. Step 4: Simplify right side
   1,721.51x = 2,222,466.30
5. Step 5: Solve for x
   x = 2,222,466.30/1,721.51
6. Step 6: Final answer
   x = 1,291.00