Finding the Third Proportional to 64,560 and 139,839

Step by Step Solution

1. Step 1: Write the proportion equation
   64,560 : 139,839 = 139,839 : x
2. Step 2: Convert to fraction form
   64,560/139,839 = 139,839/x
3. Step 3: Cross multiply
   64,560x = 139,839 × 139,839
4. Step 4: Simplify right side
   64,560x = 19,554,945,921
5. Step 5: Solve for x
   x = 19,554,945,921/64,560
6. Step 6: Final answer
   x = 302,895.69