Finding the Third Proportional to 20,570 and 42,601

Step by Step Solution

1. Step 1: Write the proportion equation
   20,570 : 42,601 = 42,601 : x
2. Step 2: Convert to fraction form
   20,570/42,601 = 42,601/x
3. Step 3: Cross multiply
   20,570x = 42,601 × 42,601
4. Step 4: Simplify right side
   20,570x = 1,814,845,201
5. Step 5: Solve for x
   x = 1,814,845,201/20,570
6. Step 6: Final answer
   x = 88,227.77