Finding the Fourth Proportional to 2,067.27, 3,100.78 and 768.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,067.27 : 3,100.78 = 768.63 : x
2. Step 2: Convert to fraction form
   2,067.27/3,100.78 = 768.63/x
3. Step 3: Cross multiply
   2,067.27x = 3,100.78 × 768.63
4. Step 4: Simplify right side
   2,067.27x = 2,383,352.53
5. Step 5: Solve for x
   x = 2,383,352.53/2,067.27
6. Step 6: Final answer
   x = 1,152.90