Finding the Third Proportional to 320,510 and 683,916

Step by Step Solution

1. Step 1: Write the proportion equation
   320,510 : 683,916 = 683,916 : x
2. Step 2: Convert to fraction form
   320,510/683,916 = 683,916/x
3. Step 3: Cross multiply
   320,510x = 683,916 × 683,916
4. Step 4: Simplify right side
   320,510x = 467,741,095,056
5. Step 5: Solve for x
   x = 467,741,095,056/320,510
6. Step 6: Final answer
   x = 1,459,365.06