Finding the Third Proportional to 65,008 and 139,880

Step by Step Solution

1. Step 1: Write the proportion equation
   65,008 : 139,880 = 139,880 : x
2. Step 2: Convert to fraction form
   65,008/139,880 = 139,880/x
3. Step 3: Cross multiply
   65,008x = 139,880 × 139,880
4. Step 4: Simplify right side
   65,008x = 19,566,414,400
5. Step 5: Solve for x
   x = 19,566,414,400/65,008
6. Step 6: Final answer
   x = 300,984.72