Finding the Third Proportional to 151,299 and 322,470

Step by Step Solution

1. Step 1: Write the proportion equation
   151,299 : 322,470 = 322,470 : x
2. Step 2: Convert to fraction form
   151,299/322,470 = 322,470/x
3. Step 3: Cross multiply
   151,299x = 322,470 × 322,470
4. Step 4: Simplify right side
   151,299x = 103,986,900,900
5. Step 5: Solve for x
   x = 103,986,900,900/151,299
6. Step 6: Final answer
   x = 687,294.04