Finding the Third Proportional to 64,900 and 139,504

Step by Step Solution

1. Step 1: Write the proportion equation
   64,900 : 139,504 = 139,504 : x
2. Step 2: Convert to fraction form
   64,900/139,504 = 139,504/x
3. Step 3: Cross multiply
   64,900x = 139,504 × 139,504
4. Step 4: Simplify right side
   64,900x = 19,461,366,016
5. Step 5: Solve for x
   x = 19,461,366,016/64,900
6. Step 6: Final answer
   x = 299,866.96