Finding the Fourth Proportional to 1,338.05, 1,846.60 and 748.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338.05 : 1,846.60 = 748.78 : x
2. Step 2: Convert to fraction form
   1,338.05/1,846.60 = 748.78/x
3. Step 3: Cross multiply
   1,338.05x = 1,846.60 × 748.78
4. Step 4: Simplify right side
   1,338.05x = 1,382,690.66
5. Step 5: Solve for x
   x = 1,382,690.66/1,338.05
6. Step 6: Final answer
   x = 1,033.36