Finding the Fourth Proportional to 2,049.60, 3,074.62 and 816.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,049.60 : 3,074.62 = 816.72 : x
2. Step 2: Convert to fraction form
   2,049.60/3,074.62 = 816.72/x
3. Step 3: Cross multiply
   2,049.60x = 3,074.62 × 816.72
4. Step 4: Simplify right side
   2,049.60x = 2,511,103.65
5. Step 5: Solve for x
   x = 2,511,103.65/2,049.60
6. Step 6: Final answer
   x = 1,225.17