Finding the Fourth Proportional to 2,158.09, 3,238.38 and 908.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158.09 : 3,238.38 = 908.56 : x
2. Step 2: Convert to fraction form
   2,158.09/3,238.38 = 908.56/x
3. Step 3: Cross multiply
   2,158.09x = 3,238.38 × 908.56
4. Step 4: Simplify right side
   2,158.09x = 2,942,262.53
5. Step 5: Solve for x
   x = 2,942,262.53/2,158.09
6. Step 6: Final answer
   x = 1,363.36