Finding the Fourth Proportional to 2,418.89, 3,628.37 and 687.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,418.89 : 3,628.37 = 687.52 : x
2. Step 2: Convert to fraction form
   2,418.89/3,628.37 = 687.52/x
3. Step 3: Cross multiply
   2,418.89x = 3,628.37 × 687.52
4. Step 4: Simplify right side
   2,418.89x = 2,494,576.94
5. Step 5: Solve for x
   x = 2,494,576.94/2,418.89
6. Step 6: Final answer
   x = 1,031.29