Finding the Third Proportional to 166,105 and 389,957

Step by Step Solution

1. Step 1: Write the proportion equation
   166,105 : 389,957 = 389,957 : x
2. Step 2: Convert to fraction form
   166,105/389,957 = 389,957/x
3. Step 3: Cross multiply
   166,105x = 389,957 × 389,957
4. Step 4: Simplify right side
   166,105x = 152,066,461,849
5. Step 5: Solve for x
   x = 152,066,461,849/166,105
6. Step 6: Final answer
   x = 915,483.95