Finding the Fourth Proportional to 2,639.94, 3,960.45 and 908.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,639.94 : 3,960.45 = 908.34 : x
2. Step 2: Convert to fraction form
   2,639.94/3,960.45 = 908.34/x
3. Step 3: Cross multiply
   2,639.94x = 3,960.45 × 908.34
4. Step 4: Simplify right side
   2,639.94x = 3,597,435.15
5. Step 5: Solve for x
   x = 3,597,435.15/2,639.94
6. Step 6: Final answer
   x = 1,362.70