Finding the Fourth Proportional to 2,385.97, 3,578.31 and 1,605.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.97 : 3,578.31 = 1,605.52 : x
2. Step 2: Convert to fraction form
   2,385.97/3,578.31 = 1,605.52/x
3. Step 3: Cross multiply
   2,385.97x = 3,578.31 × 1,605.52
4. Step 4: Simplify right side
   2,385.97x = 5,745,048.27
5. Step 5: Solve for x
   x = 5,745,048.27/2,385.97
6. Step 6: Final answer
   x = 2,407.85