Finding the Fourth Proportional to 2,464.79, 3,695.72 and 820.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,464.79 : 3,695.72 = 820.89 : x
2. Step 2: Convert to fraction form
   2,464.79/3,695.72 = 820.89/x
3. Step 3: Cross multiply
   2,464.79x = 3,695.72 × 820.89
4. Step 4: Simplify right side
   2,464.79x = 3,033,775.49
5. Step 5: Solve for x
   x = 3,033,775.49/2,464.79
6. Step 6: Final answer
   x = 1,230.85