Finding the Fourth Proportional to 3,538.58, 5,297.46 and 2,618.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,538.58 : 5,297.46 = 2,618.30 : x
2. Step 2: Convert to fraction form
   3,538.58/5,297.46 = 2,618.30/x
3. Step 3: Cross multiply
   3,538.58x = 5,297.46 × 2,618.30
4. Step 4: Simplify right side
   3,538.58x = 13,870,339.52
5. Step 5: Solve for x
   x = 13,870,339.52/3,538.58
6. Step 6: Final answer
   x = 3,919.75