Finding the Third Proportional to 12,217.50 and 18,411.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,217.50 : 18,411.75 = 18,411.75 : x
2. Step 2: Convert to fraction form
   12,217.50/18,411.75 = 18,411.75/x
3. Step 3: Cross multiply
   12,217.50x = 18,411.75 × 18,411.75
4. Step 4: Simplify right side
   12,217.50x = 338,992,538.06
5. Step 5: Solve for x
   x = 338,992,538.06/12,217.50
6. Step 6: Final answer
   x = 27,746.47