Finding the Fourth Proportional to 1,605.57, 2,409.72 and 1,144.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,605.57 : 2,409.72 = 1,144.48 : x
2. Step 2: Convert to fraction form
   1,605.57/2,409.72 = 1,144.48/x
3. Step 3: Cross multiply
   1,605.57x = 2,409.72 × 1,144.48
4. Step 4: Simplify right side
   1,605.57x = 2,757,864.30
5. Step 5: Solve for x
   x = 2,757,864.30/1,605.57
6. Step 6: Final answer
   x = 1,717.69