Finding the Fourth Proportional to 2,418.67, 3,628.59 and 687.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,418.67 : 3,628.59 = 687.25 : x
2. Step 2: Convert to fraction form
   2,418.67/3,628.59 = 687.25/x
3. Step 3: Cross multiply
   2,418.67x = 3,628.59 × 687.25
4. Step 4: Simplify right side
   2,418.67x = 2,493,748.48
5. Step 5: Solve for x
   x = 2,493,748.48/2,418.67
6. Step 6: Final answer
   x = 1,031.04