Finding the Fourth Proportional to 3,500.69, 5,240.16 and 2,618

Step by Step Solution

1. Step 1: Write the proportion equation
   3,500.69 : 5,240.16 = 2,618 : x
2. Step 2: Convert to fraction form
   3,500.69/5,240.16 = 2,618/x
3. Step 3: Cross multiply
   3,500.69x = 5,240.16 × 2,618
4. Step 4: Simplify right side
   3,500.69x = 13,718,738.88
5. Step 5: Solve for x
   x = 13,718,738.88/3,500.69
6. Step 6: Final answer
   x = 3,918.87