Finding the Third Proportional to 12,309.19 and 18,459.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,309.19 : 18,459.56 = 18,459.56 : x
2. Step 2: Convert to fraction form
   12,309.19/18,459.56 = 18,459.56/x
3. Step 3: Cross multiply
   12,309.19x = 18,459.56 × 18,459.56
4. Step 4: Simplify right side
   12,309.19x = 340,755,447.69
5. Step 5: Solve for x
   x = 340,755,447.69/12,309.19
6. Step 6: Final answer
   x = 27,683.02