Finding the Third Proportional to 181,066 and 389,870

Step by Step Solution

1. Step 1: Write the proportion equation
   181,066 : 389,870 = 389,870 : x
2. Step 2: Convert to fraction form
   181,066/389,870 = 389,870/x
3. Step 3: Cross multiply
   181,066x = 389,870 × 389,870
4. Step 4: Simplify right side
   181,066x = 151,998,616,900
5. Step 5: Solve for x
   x = 151,998,616,900/181,066
6. Step 6: Final answer
   x = 839,465.26