Finding the Third Proportional to 64,936 and 139,988

Step by Step Solution

1. Step 1: Write the proportion equation
   64,936 : 139,988 = 139,988 : x
2. Step 2: Convert to fraction form
   64,936/139,988 = 139,988/x
3. Step 3: Cross multiply
   64,936x = 139,988 × 139,988
4. Step 4: Simplify right side
   64,936x = 19,596,640,144
5. Step 5: Solve for x
   x = 19,596,640,144/64,936
6. Step 6: Final answer
   x = 301,783.91