Finding the Third Proportional to 9,216 and 12,888

Step by Step Solution

1. Step 1: Write the proportion equation
   9,216 : 12,888 = 12,888 : x
2. Step 2: Convert to fraction form
   9,216/12,888 = 12,888/x
3. Step 3: Cross multiply
   9,216x = 12,888 × 12,888
4. Step 4: Simplify right side
   9,216x = 166,100,544
5. Step 5: Solve for x
   x = 166,100,544/9,216
6. Step 6: Final answer
   x = 18,023.06