Finding the Fourth Proportional to 1,068.78, 1,603.41 and 798.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,068.78 : 1,603.41 = 798.09 : x
2. Step 2: Convert to fraction form
   1,068.78/1,603.41 = 798.09/x
3. Step 3: Cross multiply
   1,068.78x = 1,603.41 × 798.09
4. Step 4: Simplify right side
   1,068.78x = 1,279,665.49
5. Step 5: Solve for x
   x = 1,279,665.49/1,068.78
6. Step 6: Final answer
   x = 1,197.31