Finding the Fourth Proportional to 2,758.18, 4,137.69 and 908.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,758.18 : 4,137.69 = 908.89 : x
2. Step 2: Convert to fraction form
   2,758.18/4,137.69 = 908.89/x
3. Step 3: Cross multiply
   2,758.18x = 4,137.69 × 908.89
4. Step 4: Simplify right side
   2,758.18x = 3,760,705.06
5. Step 5: Solve for x
   x = 3,760,705.06/2,758.18
6. Step 6: Final answer
   x = 1,363.47