Finding the Fourth Proportional to 2,442.81, 3,663.50 and 687.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,442.81 : 3,663.50 = 687.69 : x
2. Step 2: Convert to fraction form
   2,442.81/3,663.50 = 687.69/x
3. Step 3: Cross multiply
   2,442.81x = 3,663.50 × 687.69
4. Step 4: Simplify right side
   2,442.81x = 2,519,348.88
5. Step 5: Solve for x
   x = 2,519,348.88/2,442.81
6. Step 6: Final answer
   x = 1,031.33