Finding the Fourth Proportional to 2,836.80, 3,906.72 and 2,049.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,836.80 : 3,906.72 = 2,049.60 : x
2. Step 2: Convert to fraction form
   2,836.80/3,906.72 = 2,049.60/x
3. Step 3: Cross multiply
   2,836.80x = 3,906.72 × 2,049.60
4. Step 4: Simplify right side
   2,836.80x = 8,007,213.31
5. Step 5: Solve for x
   x = 8,007,213.31/2,836.80
6. Step 6: Final answer
   x = 2,822.62