Finding the Fourth Proportional to 3,099.79, 4,648.56 and 908.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,099.79 : 4,648.56 = 908.05 : x
2. Step 2: Convert to fraction form
   3,099.79/4,648.56 = 908.05/x
3. Step 3: Cross multiply
   3,099.79x = 4,648.56 × 908.05
4. Step 4: Simplify right side
   3,099.79x = 4,221,124.91
5. Step 5: Solve for x
   x = 4,221,124.91/3,099.79
6. Step 6: Final answer
   x = 1,361.75