Finding the Fourth Proportional to 2,419.17, 3,629.34 and 687.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,419.17 : 3,629.34 = 687.75 : x
2. Step 2: Convert to fraction form
   2,419.17/3,629.34 = 687.75/x
3. Step 3: Cross multiply
   2,419.17x = 3,629.34 × 687.75
4. Step 4: Simplify right side
   2,419.17x = 2,496,078.59
5. Step 5: Solve for x
   x = 2,496,078.59/2,419.17
6. Step 6: Final answer
   x = 1,031.79