Finding the Third Proportional to 152,508 and 322,440

Step by Step Solution

1. Step 1: Write the proportion equation
   152,508 : 322,440 = 322,440 : x
2. Step 2: Convert to fraction form
   152,508/322,440 = 322,440/x
3. Step 3: Cross multiply
   152,508x = 322,440 × 322,440
4. Step 4: Simplify right side
   152,508x = 103,967,553,600
5. Step 5: Solve for x
   x = 103,967,553,600/152,508
6. Step 6: Final answer
   x = 681,718.69