Finding the Third Proportional to 12,906 and 20,445

Step by Step Solution

1. Step 1: Write the proportion equation
   12,906 : 20,445 = 20,445 : x
2. Step 2: Convert to fraction form
   12,906/20,445 = 20,445/x
3. Step 3: Cross multiply
   12,906x = 20,445 × 20,445
4. Step 4: Simplify right side
   12,906x = 417,998,025
5. Step 5: Solve for x
   x = 417,998,025/12,906
6. Step 6: Final answer
   x = 32,387.88