Finding the Third Proportional to 151,686 and 331,020

Step by Step Solution

1. Step 1: Write the proportion equation
   151,686 : 331,020 = 331,020 : x
2. Step 2: Convert to fraction form
   151,686/331,020 = 331,020/x
3. Step 3: Cross multiply
   151,686x = 331,020 × 331,020
4. Step 4: Simplify right side
   151,686x = 109,574,240,400
5. Step 5: Solve for x
   x = 109,574,240,400/151,686
6. Step 6: Final answer
   x = 722,375.44