Finding the Fourth Proportional to 1,378.43, 1,902.25 and 748.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378.43 : 1,902.25 = 748.97 : x
2. Step 2: Convert to fraction form
   1,378.43/1,902.25 = 748.97/x
3. Step 3: Cross multiply
   1,378.43x = 1,902.25 × 748.97
4. Step 4: Simplify right side
   1,378.43x = 1,424,715.52
5. Step 5: Solve for x
   x = 1,424,715.52/1,378.43
6. Step 6: Final answer
   x = 1,033.58