Finding the Third Proportional to 64,687 and 140,764

Step by Step Solution

1. Step 1: Write the proportion equation
   64,687 : 140,764 = 140,764 : x
2. Step 2: Convert to fraction form
   64,687/140,764 = 140,764/x
3. Step 3: Cross multiply
   64,687x = 140,764 × 140,764
4. Step 4: Simplify right side
   64,687x = 19,814,503,696
5. Step 5: Solve for x
   x = 19,814,503,696/64,687
6. Step 6: Final answer
   x = 306,313.54