Finding the Fourth Proportional to 1,571.52, 2,168.61 and 908.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.52 : 2,168.61 = 908.58 : x
2. Step 2: Convert to fraction form
   1,571.52/2,168.61 = 908.58/x
3. Step 3: Cross multiply
   1,571.52x = 2,168.61 × 908.58
4. Step 4: Simplify right side
   1,571.52x = 1,970,355.67
5. Step 5: Solve for x
   x = 1,970,355.67/1,571.52
6. Step 6: Final answer
   x = 1,253.79