Finding the Fourth Proportional to 1,681.89, 2,320.83 and 935.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681.89 : 2,320.83 = 935.73 : x
2. Step 2: Convert to fraction form
   1,681.89/2,320.83 = 935.73/x
3. Step 3: Cross multiply
   1,681.89x = 2,320.83 × 935.73
4. Step 4: Simplify right side
   1,681.89x = 2,171,670.26
5. Step 5: Solve for x
   x = 2,171,670.26/1,681.89
6. Step 6: Final answer
   x = 1,291.21