Finding the Third Proportional to 20,664 and 42,600

Step by Step Solution

1. Step 1: Write the proportion equation
   20,664 : 42,600 = 42,600 : x
2. Step 2: Convert to fraction form
   20,664/42,600 = 42,600/x
3. Step 3: Cross multiply
   20,664x = 42,600 × 42,600
4. Step 4: Simplify right side
   20,664x = 1,814,760,000
5. Step 5: Solve for x
   x = 1,814,760,000/20,664
6. Step 6: Final answer
   x = 87,822.30