Finding the Fourth Proportional to 2,757.59, 4,136.89 and 908.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,757.59 : 4,136.89 = 908.78 : x
2. Step 2: Convert to fraction form
   2,757.59/4,136.89 = 908.78/x
3. Step 3: Cross multiply
   2,757.59x = 4,136.89 × 908.78
4. Step 4: Simplify right side
   2,757.59x = 3,759,499.94
5. Step 5: Solve for x
   x = 3,759,499.94/2,757.59
6. Step 6: Final answer
   x = 1,363.33