Finding the Third Proportional to 12,643.50 and 18,212.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,643.50 : 18,212.25 = 18,212.25 : x
2. Step 2: Convert to fraction form
   12,643.50/18,212.25 = 18,212.25/x
3. Step 3: Cross multiply
   12,643.50x = 18,212.25 × 18,212.25
4. Step 4: Simplify right side
   12,643.50x = 331,686,050.06
5. Step 5: Solve for x
   x = 331,686,050.06/12,643.50
6. Step 6: Final answer
   x = 26,233.72