Finding the Third Proportional to 12,217.50 and 18,428.63

Step by Step Solution

1. Step 1: Write the proportion equation
   12,217.50 : 18,428.63 = 18,428.63 : x
2. Step 2: Convert to fraction form
   12,217.50/18,428.63 = 18,428.63/x
3. Step 3: Cross multiply
   12,217.50x = 18,428.63 × 18,428.63
4. Step 4: Simplify right side
   12,217.50x = 339,614,219.39
5. Step 5: Solve for x
   x = 339,614,219.39/12,217.50
6. Step 6: Final answer
   x = 27,797.36