Finding the Fourth Proportional to 2,380.24, 3,568.98 and 919.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.24 : 3,568.98 = 919.20 : x
2. Step 2: Convert to fraction form
   2,380.24/3,568.98 = 919.20/x
3. Step 3: Cross multiply
   2,380.24x = 3,568.98 × 919.20
4. Step 4: Simplify right side
   2,380.24x = 3,280,606.42
5. Step 5: Solve for x
   x = 3,280,606.42/2,380.24
6. Step 6: Final answer
   x = 1,378.27