Finding the Third Proportional to 20,602 and 42,663

Step by Step Solution

1. Step 1: Write the proportion equation
   20,602 : 42,663 = 42,663 : x
2. Step 2: Convert to fraction form
   20,602/42,663 = 42,663/x
3. Step 3: Cross multiply
   20,602x = 42,663 × 42,663
4. Step 4: Simplify right side
   20,602x = 1,820,131,569
5. Step 5: Solve for x
   x = 1,820,131,569/20,602
6. Step 6: Final answer
   x = 88,347.32