Finding the Third Proportional to 139,150.69 and 208,361.81

Step by Step Solution

1. Step 1: Write the proportion equation
   139,150.69 : 208,361.81 = 208,361.81 : x
2. Step 2: Convert to fraction form
   139,150.69/208,361.81 = 208,361.81/x
3. Step 3: Cross multiply
   139,150.69x = 208,361.81 × 208,361.81
4. Step 4: Simplify right side
   139,150.69x = 43,414,644,908.29
5. Step 5: Solve for x
   x = 43,414,644,908.29/139,150.69
6. Step 6: Final answer
   x = 311,997.34