Finding the Third Proportional to 8,439.82 and 18,398.39

Step by Step Solution

1. Step 1: Write the proportion equation
   8,439.82 : 18,398.39 = 18,398.39 : x
2. Step 2: Convert to fraction form
   8,439.82/18,398.39 = 18,398.39/x
3. Step 3: Cross multiply
   8,439.82x = 18,398.39 × 18,398.39
4. Step 4: Simplify right side
   8,439.82x = 338,500,777.59
5. Step 5: Solve for x
   x = 338,500,777.59/8,439.82
6. Step 6: Final answer
   x = 40,107.58