Finding the Fourth Proportional to 1,571.40, 2,168.39 and 908.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.40 : 2,168.39 = 908.25 : x
2. Step 2: Convert to fraction form
   1,571.40/2,168.39 = 908.25/x
3. Step 3: Cross multiply
   1,571.40x = 2,168.39 × 908.25
4. Step 4: Simplify right side
   1,571.40x = 1,969,429.25
5. Step 5: Solve for x
   x = 1,969,429.25/1,571.40
6. Step 6: Final answer
   x = 1,253.30