Finding the Fourth Proportional to 2,463.40, 3,694.96 and 820.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,463.40 : 3,694.96 = 820.72 : x
2. Step 2: Convert to fraction form
   2,463.40/3,694.96 = 820.72/x
3. Step 3: Cross multiply
   2,463.40x = 3,694.96 × 820.72
4. Step 4: Simplify right side
   2,463.40x = 3,032,527.57
5. Step 5: Solve for x
   x = 3,032,527.57/2,463.40
6. Step 6: Final answer
   x = 1,231.03