Finding the Third Proportional to 21,639 and 31,607

Step by Step Solution

1. Step 1: Write the proportion equation
   21,639 : 31,607 = 31,607 : x
2. Step 2: Convert to fraction form
   21,639/31,607 = 31,607/x
3. Step 3: Cross multiply
   21,639x = 31,607 × 31,607
4. Step 4: Simplify right side
   21,639x = 999,002,449
5. Step 5: Solve for x
   x = 999,002,449/21,639
6. Step 6: Final answer
   x = 46,166.76