Finding the Fourth Proportional to 1,019.39, 1,408.19 and 908.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,019.39 : 1,408.19 = 908.82 : x
2. Step 2: Convert to fraction form
   1,019.39/1,408.19 = 908.82/x
3. Step 3: Cross multiply
   1,019.39x = 1,408.19 × 908.82
4. Step 4: Simplify right side
   1,019.39x = 1,279,786.69
5. Step 5: Solve for x
   x = 1,279,786.69/1,019.39
6. Step 6: Final answer
   x = 1,255.45