Finding the Fourth Proportional to 1,338.78, 1,847.49 and 749.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.78 : 1,847.49 = 749.31 : x
2. Step 2: Convert to fraction form
   1,338.78/1,847.49 = 749.31/x
3. Step 3: Cross multiply
   1,338.78x = 1,847.49 × 749.31
4. Step 4: Simplify right side
   1,338.78x = 1,384,342.73
5. Step 5: Solve for x
   x = 1,384,342.73/1,338.78
6. Step 6: Final answer
   x = 1,034.03