Finding the Third Proportional to 209,044 and 315,510

Step by Step Solution

1. Step 1: Write the proportion equation
   209,044 : 315,510 = 315,510 : x
2. Step 2: Convert to fraction form
   209,044/315,510 = 315,510/x
3. Step 3: Cross multiply
   209,044x = 315,510 × 315,510
4. Step 4: Simplify right side
   209,044x = 99,546,560,100
5. Step 5: Solve for x
   x = 99,546,560,100/209,044
6. Step 6: Final answer
   x = 476,199.08