Finding the Fourth Proportional to 1,393.38, 1,922.89 and 763.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.38 : 1,922.89 = 763.97 : x
2. Step 2: Convert to fraction form
   1,393.38/1,922.89 = 763.97/x
3. Step 3: Cross multiply
   1,393.38x = 1,922.89 × 763.97
4. Step 4: Simplify right side
   1,393.38x = 1,469,028.82
5. Step 5: Solve for x
   x = 1,469,028.82/1,393.38
6. Step 6: Final answer
   x = 1,054.29