Finding the Third Proportional to 72,221 and 161,039

Step by Step Solution

1. Step 1: Write the proportion equation
   72,221 : 161,039 = 161,039 : x
2. Step 2: Convert to fraction form
   72,221/161,039 = 161,039/x
3. Step 3: Cross multiply
   72,221x = 161,039 × 161,039
4. Step 4: Simplify right side
   72,221x = 25,933,559,521
5. Step 5: Solve for x
   x = 25,933,559,521/72,221
6. Step 6: Final answer
   x = 359,086.13