Finding the Fourth Proportional to 1,393.49, 1,922.99 and 764.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.49 : 1,922.99 = 764.03 : x
2. Step 2: Convert to fraction form
   1,393.49/1,922.99 = 764.03/x
3. Step 3: Cross multiply
   1,393.49x = 1,922.99 × 764.03
4. Step 4: Simplify right side
   1,393.49x = 1,469,208.61
5. Step 5: Solve for x
   x = 1,469,208.61/1,393.49
6. Step 6: Final answer
   x = 1,054.34