Finding the Third Proportional to 64,442 and 139,956

Step by Step Solution

1. Step 1: Write the proportion equation
   64,442 : 139,956 = 139,956 : x
2. Step 2: Convert to fraction form
   64,442/139,956 = 139,956/x
3. Step 3: Cross multiply
   64,442x = 139,956 × 139,956
4. Step 4: Simplify right side
   64,442x = 19,587,681,936
5. Step 5: Solve for x
   x = 19,587,681,936/64,442
6. Step 6: Final answer
   x = 303,958.32