Finding the Fourth Proportional to 2,768.18, 4,151.86 and 919.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,768.18 : 4,151.86 = 919.25 : x
2. Step 2: Convert to fraction form
   2,768.18/4,151.86 = 919.25/x
3. Step 3: Cross multiply
   2,768.18x = 4,151.86 × 919.25
4. Step 4: Simplify right side
   2,768.18x = 3,816,589.82
5. Step 5: Solve for x
   x = 3,816,589.82/2,768.18
6. Step 6: Final answer
   x = 1,378.74