Finding the Third Proportional to 12,216 and 18,496.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,216 : 18,496.50 = 18,496.50 : x
2. Step 2: Convert to fraction form
   12,216/18,496.50 = 18,496.50/x
3. Step 3: Cross multiply
   12,216x = 18,496.50 × 18,496.50
4. Step 4: Simplify right side
   12,216x = 342,120,512.25
5. Step 5: Solve for x
   x = 342,120,512.25/12,216
6. Step 6: Final answer
   x = 28,005.94