Finding the Third Proportional to 27,721 and 42,607

Step by Step Solution

1. Step 1: Write the proportion equation
   27,721 : 42,607 = 42,607 : x
2. Step 2: Convert to fraction form
   27,721/42,607 = 42,607/x
3. Step 3: Cross multiply
   27,721x = 42,607 × 42,607
4. Step 4: Simplify right side
   27,721x = 1,815,356,449
5. Step 5: Solve for x
   x = 1,815,356,449/27,721
6. Step 6: Final answer
   x = 65,486.69