Finding the Fourth Proportional to 2,618.82, 3,909.15 and 2,426.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,618.82 : 3,909.15 = 2,426.09 : x
2. Step 2: Convert to fraction form
   2,618.82/3,909.15 = 2,426.09/x
3. Step 3: Cross multiply
   2,618.82x = 3,909.15 × 2,426.09
4. Step 4: Simplify right side
   2,618.82x = 9,483,930.18
5. Step 5: Solve for x
   x = 9,483,930.18/2,618.82
6. Step 6: Final answer
   x = 3,621.45