Finding the Third Proportional to 64,608 and 139,108

Step by Step Solution

1. Step 1: Write the proportion equation
   64,608 : 139,108 = 139,108 : x
2. Step 2: Convert to fraction form
   64,608/139,108 = 139,108/x
3. Step 3: Cross multiply
   64,608x = 139,108 × 139,108
4. Step 4: Simplify right side
   64,608x = 19,351,035,664
5. Step 5: Solve for x
   x = 19,351,035,664/64,608
6. Step 6: Final answer
   x = 299,514.54