Finding the Fourth Proportional to 2,380.57, 3,570.49 and 919.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.57 : 3,570.49 = 919.54 : x
2. Step 2: Convert to fraction form
   2,380.57/3,570.49 = 919.54/x
3. Step 3: Cross multiply
   2,380.57x = 3,570.49 × 919.54
4. Step 4: Simplify right side
   2,380.57x = 3,283,208.37
5. Step 5: Solve for x
   x = 3,283,208.37/2,380.57
6. Step 6: Final answer
   x = 1,379.17