Finding the Third Proportional to 20,404 and 41,672

Step by Step Solution

1. Step 1: Write the proportion equation
   20,404 : 41,672 = 41,672 : x
2. Step 2: Convert to fraction form
   20,404/41,672 = 41,672/x
3. Step 3: Cross multiply
   20,404x = 41,672 × 41,672
4. Step 4: Simplify right side
   20,404x = 1,736,555,584
5. Step 5: Solve for x
   x = 1,736,555,584/20,404
6. Step 6: Final answer
   x = 85,108.59