Finding the Third Proportional to 9,240 and 12,216

Step by Step Solution

1. Step 1: Write the proportion equation
   9,240 : 12,216 = 12,216 : x
2. Step 2: Convert to fraction form
   9,240/12,216 = 12,216/x
3. Step 3: Cross multiply
   9,240x = 12,216 × 12,216
4. Step 4: Simplify right side
   9,240x = 149,230,656
5. Step 5: Solve for x
   x = 149,230,656/9,240
6. Step 6: Final answer
   x = 16,150.50