Finding the Third Proportional to 120,385 and 161,055

Step by Step Solution

1. Step 1: Write the proportion equation
   120,385 : 161,055 = 161,055 : x
2. Step 2: Convert to fraction form
   120,385/161,055 = 161,055/x
3. Step 3: Cross multiply
   120,385x = 161,055 × 161,055
4. Step 4: Simplify right side
   120,385x = 25,938,713,025
5. Step 5: Solve for x
   x = 25,938,713,025/120,385
6. Step 6: Final answer
   x = 215,464.66