Finding the Fourth Proportional to 1,393.43, 1,922.87 and 763.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.43 : 1,922.87 = 763.98 : x
2. Step 2: Convert to fraction form
   1,393.43/1,922.87 = 763.98/x
3. Step 3: Cross multiply
   1,393.43x = 1,922.87 × 763.98
4. Step 4: Simplify right side
   1,393.43x = 1,469,030.40
5. Step 5: Solve for x
   x = 1,469,030.40/1,393.43
6. Step 6: Final answer
   x = 1,054.26