Finding the Fourth Proportional to 2,144.17, 2,960.34 and 1,919.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.17 : 2,960.34 = 1,919.71 : x
2. Step 2: Convert to fraction form
   2,144.17/2,960.34 = 1,919.71/x
3. Step 3: Cross multiply
   2,144.17x = 2,960.34 × 1,919.71
4. Step 4: Simplify right side
   2,144.17x = 5,682,994.30
5. Step 5: Solve for x
   x = 5,682,994.30/2,144.17
6. Step 6: Final answer
   x = 2,650.44