Finding the Fourth Proportional to 2,479.52, 3,719.09 and 919.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,479.52 : 3,719.09 = 919.23 : x
2. Step 2: Convert to fraction form
   2,479.52/3,719.09 = 919.23/x
3. Step 3: Cross multiply
   2,479.52x = 3,719.09 × 919.23
4. Step 4: Simplify right side
   2,479.52x = 3,418,694.50
5. Step 5: Solve for x
   x = 3,418,694.50/2,479.52
6. Step 6: Final answer
   x = 1,378.78