Finding the Third Proportional to 20,440 and 20,440

Step by Step Solution

1. Step 1: Write the proportion equation
   20,440 : 20,440 = 20,440 : x
2. Step 2: Convert to fraction form
   20,440/20,440 = 20,440/x
3. Step 3: Cross multiply
   20,440x = 20,440 × 20,440
4. Step 4: Simplify right side
   20,440x = 417,793,600
5. Step 5: Solve for x
   x = 417,793,600/20,440
6. Step 6: Final answer
   x = 20,440