Finding the Third Proportional to 12,784 and 20,976

Step by Step Solution

1. Step 1: Write the proportion equation
   12,784 : 20,976 = 20,976 : x
2. Step 2: Convert to fraction form
   12,784/20,976 = 20,976/x
3. Step 3: Cross multiply
   12,784x = 20,976 × 20,976
4. Step 4: Simplify right side
   12,784x = 439,992,576
5. Step 5: Solve for x
   x = 439,992,576/12,784
6. Step 6: Final answer
   x = 34,417.44