Finding the Third Proportional to 64,398 and 140,238

Step by Step Solution

1. Step 1: Write the proportion equation
   64,398 : 140,238 = 140,238 : x
2. Step 2: Convert to fraction form
   64,398/140,238 = 140,238/x
3. Step 3: Cross multiply
   64,398x = 140,238 × 140,238
4. Step 4: Simplify right side
   64,398x = 19,666,696,644
5. Step 5: Solve for x
   x = 19,666,696,644/64,398
6. Step 6: Final answer
   x = 305,392.97