Finding the Fourth Proportional to 1,393.43, 1,922.91 and 763.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.43 : 1,922.91 = 763.96 : x
2. Step 2: Convert to fraction form
   1,393.43/1,922.91 = 763.96/x
3. Step 3: Cross multiply
   1,393.43x = 1,922.91 × 763.96
4. Step 4: Simplify right side
   1,393.43x = 1,469,026.32
5. Step 5: Solve for x
   x = 1,469,026.32/1,393.43
6. Step 6: Final answer
   x = 1,054.25