Finding the Fourth Proportional to 2,207.72, 3,308.34 and 908.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,207.72 : 3,308.34 = 908.48 : x
2. Step 2: Convert to fraction form
   2,207.72/3,308.34 = 908.48/x
3. Step 3: Cross multiply
   2,207.72x = 3,308.34 × 908.48
4. Step 4: Simplify right side
   2,207.72x = 3,005,560.72
5. Step 5: Solve for x
   x = 3,005,560.72/2,207.72
6. Step 6: Final answer
   x = 1,361.39