Finding the Third Proportional to 64,811 and 139,018

Step by Step Solution

1. Step 1: Write the proportion equation
   64,811 : 139,018 = 139,018 : x
2. Step 2: Convert to fraction form
   64,811/139,018 = 139,018/x
3. Step 3: Cross multiply
   64,811x = 139,018 × 139,018
4. Step 4: Simplify right side
   64,811x = 19,326,004,324
5. Step 5: Solve for x
   x = 19,326,004,324/64,811
6. Step 6: Final answer
   x = 298,190.19