Finding the Third Proportional to 8,398.69 and 12,355.03

Step by Step Solution

1. Step 1: Write the proportion equation
   8,398.69 : 12,355.03 = 12,355.03 : x
2. Step 2: Convert to fraction form
   8,398.69/12,355.03 = 12,355.03/x
3. Step 3: Cross multiply
   8,398.69x = 12,355.03 × 12,355.03
4. Step 4: Simplify right side
   8,398.69x = 152,646,797.19
5. Step 5: Solve for x
   x = 152,646,797.19/8,398.69
6. Step 6: Final answer
   x = 18,175.08