Finding the Fourth Proportional to 2,144.89, 3,217.89 and 605.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.89 : 3,217.89 = 605.89 : x
2. Step 2: Convert to fraction form
   2,144.89/3,217.89 = 605.89/x
3. Step 3: Cross multiply
   2,144.89x = 3,217.89 × 605.89
4. Step 4: Simplify right side
   2,144.89x = 1,949,687.37
5. Step 5: Solve for x
   x = 1,949,687.37/2,144.89
6. Step 6: Final answer
   x = 908.99