Finding the Fourth Proportional to 2,808.91, 4,213.78 and 908.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,808.91 : 4,213.78 = 908.59 : x
2. Step 2: Convert to fraction form
   2,808.91/4,213.78 = 908.59/x
3. Step 3: Cross multiply
   2,808.91x = 4,213.78 × 908.59
4. Step 4: Simplify right side
   2,808.91x = 3,828,593.83
5. Step 5: Solve for x
   x = 3,828,593.83/2,808.91
6. Step 6: Final answer
   x = 1,363.02