Finding the Third Proportional to 812,540 and 1,257,510

Step by Step Solution

1. Step 1: Write the proportion equation
   812,540 : 1,257,510 = 1,257,510 : x
2. Step 2: Convert to fraction form
   812,540/1,257,510 = 1,257,510/x
3. Step 3: Cross multiply
   812,540x = 1,257,510 × 1,257,510
4. Step 4: Simplify right side
   812,540x = 1,581,331,400,100
5. Step 5: Solve for x
   x = 1,581,331,400,100/812,540
6. Step 6: Final answer
   x = 1,946,158.22