Finding the Third Proportional to 309,150 and 651,510

Step by Step Solution

1. Step 1: Write the proportion equation
   309,150 : 651,510 = 651,510 : x
2. Step 2: Convert to fraction form
   309,150/651,510 = 651,510/x
3. Step 3: Cross multiply
   309,150x = 651,510 × 651,510
4. Step 4: Simplify right side
   309,150x = 424,465,280,100
5. Step 5: Solve for x
   x = 424,465,280,100/309,150
6. Step 6: Final answer
   x = 1,373,007.54