Finding the Third Proportional to 64,870 and 139,744

Step by Step Solution

1. Step 1: Write the proportion equation
   64,870 : 139,744 = 139,744 : x
2. Step 2: Convert to fraction form
   64,870/139,744 = 139,744/x
3. Step 3: Cross multiply
   64,870x = 139,744 × 139,744
4. Step 4: Simplify right side
   64,870x = 19,528,385,536
5. Step 5: Solve for x
   x = 19,528,385,536/64,870
6. Step 6: Final answer
   x = 301,038.78