Finding the Third Proportional to 12,768 and 21,960

Step by Step Solution

1. Step 1: Write the proportion equation
   12,768 : 21,960 = 21,960 : x
2. Step 2: Convert to fraction form
   12,768/21,960 = 21,960/x
3. Step 3: Cross multiply
   12,768x = 21,960 × 21,960
4. Step 4: Simplify right side
   12,768x = 482,241,600
5. Step 5: Solve for x
   x = 482,241,600/12,768
6. Step 6: Final answer
   x = 37,769.55