Finding the Fourth Proportional to 2,617.94, 3,919.89 and 1,382.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.94 : 3,919.89 = 1,382.78 : x
2. Step 2: Convert to fraction form
   2,617.94/3,919.89 = 1,382.78/x
3. Step 3: Cross multiply
   2,617.94x = 3,919.89 × 1,382.78
4. Step 4: Simplify right side
   2,617.94x = 5,420,345.49
5. Step 5: Solve for x
   x = 5,420,345.49/2,617.94
6. Step 6: Final answer
   x = 2,070.46