Finding the Third Proportional to 8,164.69 and 12,215.25

Step by Step Solution

1. Step 1: Write the proportion equation
   8,164.69 : 12,215.25 = 12,215.25 : x
2. Step 2: Convert to fraction form
   8,164.69/12,215.25 = 12,215.25/x
3. Step 3: Cross multiply
   8,164.69x = 12,215.25 × 12,215.25
4. Step 4: Simplify right side
   8,164.69x = 149,212,332.56
5. Step 5: Solve for x
   x = 149,212,332.56/8,164.69
6. Step 6: Final answer
   x = 18,275.33