Finding the Third Proportional to 64,282 and 139,256

Step by Step Solution

1. Step 1: Write the proportion equation
   64,282 : 139,256 = 139,256 : x
2. Step 2: Convert to fraction form
   64,282/139,256 = 139,256/x
3. Step 3: Cross multiply
   64,282x = 139,256 × 139,256
4. Step 4: Simplify right side
   64,282x = 19,392,233,536
5. Step 5: Solve for x
   x = 19,392,233,536/64,282
6. Step 6: Final answer
   x = 301,674.40