Finding the Fourth Proportional to 2,398.72, 3,574.56 and 2,320.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,398.72 : 3,574.56 = 2,320.42 : x
2. Step 2: Convert to fraction form
   2,398.72/3,574.56 = 2,320.42/x
3. Step 3: Cross multiply
   2,398.72x = 3,574.56 × 2,320.42
4. Step 4: Simplify right side
   2,398.72x = 8,294,480.52
5. Step 5: Solve for x
   x = 8,294,480.52/2,398.72
6. Step 6: Final answer
   x = 3,457.88