Finding the Fourth Proportional to 1,571.64, 2,168.89 and 908.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.64 : 2,168.89 = 908.71 : x
2. Step 2: Convert to fraction form
   1,571.64/2,168.89 = 908.71/x
3. Step 3: Cross multiply
   1,571.64x = 2,168.89 × 908.71
4. Step 4: Simplify right side
   1,571.64x = 1,970,892.03
5. Step 5: Solve for x
   x = 1,970,892.03/1,571.64
6. Step 6: Final answer
   x = 1,254.04