Finding the Fourth Proportional to 2,463.75, 3,695.72 and 820.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,463.75 : 3,695.72 = 820.31 : x
2. Step 2: Convert to fraction form
   2,463.75/3,695.72 = 820.31/x
3. Step 3: Cross multiply
   2,463.75x = 3,695.72 × 820.31
4. Step 4: Simplify right side
   2,463.75x = 3,031,613.49
5. Step 5: Solve for x
   x = 3,031,613.49/2,463.75
6. Step 6: Final answer
   x = 1,230.49