Finding the Fourth Proportional to 1,392.43, 1,921.56 and 754.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,392.43 : 1,921.56 = 754.38 : x
2. Step 2: Convert to fraction form
   1,392.43/1,921.56 = 754.38/x
3. Step 3: Cross multiply
   1,392.43x = 1,921.56 × 754.38
4. Step 4: Simplify right side
   1,392.43x = 1,449,573.05
5. Step 5: Solve for x
   x = 1,449,573.05/1,392.43
6. Step 6: Final answer
   x = 1,041.04