Finding the Third Proportional to 12,904 and 20,508

Step by Step Solution

1. Step 1: Write the proportion equation
   12,904 : 20,508 = 20,508 : x
2. Step 2: Convert to fraction form
   12,904/20,508 = 20,508/x
3. Step 3: Cross multiply
   12,904x = 20,508 × 20,508
4. Step 4: Simplify right side
   12,904x = 420,578,064
5. Step 5: Solve for x
   x = 420,578,064/12,904
6. Step 6: Final answer
   x = 32,592.84