Finding the Fourth Proportional to 2,768.31, 4,152.57 and 919.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,768.31 : 4,152.57 = 919.59 : x
2. Step 2: Convert to fraction form
   2,768.31/4,152.57 = 919.59/x
3. Step 3: Cross multiply
   2,768.31x = 4,152.57 × 919.59
4. Step 4: Simplify right side
   2,768.31x = 3,818,661.85
5. Step 5: Solve for x
   x = 3,818,661.85/2,768.31
6. Step 6: Final answer
   x = 1,379.42