Finding the Third Proportional to 12,904 and 20,432

Step by Step Solution

1. Step 1: Write the proportion equation
   12,904 : 20,432 = 20,432 : x
2. Step 2: Convert to fraction form
   12,904/20,432 = 20,432/x
3. Step 3: Cross multiply
   12,904x = 20,432 × 20,432
4. Step 4: Simplify right side
   12,904x = 417,466,624
5. Step 5: Solve for x
   x = 417,466,624/12,904
6. Step 6: Final answer
   x = 32,351.72