Finding the Third Proportional to 648,400 and 1,041,792

Step by Step Solution

1. Step 1: Write the proportion equation
   648,400 : 1,041,792 = 1,041,792 : x
2. Step 2: Convert to fraction form
   648,400/1,041,792 = 1,041,792/x
3. Step 3: Cross multiply
   648,400x = 1,041,792 × 1,041,792
4. Step 4: Simplify right side
   648,400x = 1,085,330,571,264
5. Step 5: Solve for x
   x = 1,085,330,571,264/648,400
6. Step 6: Final answer
   x = 1,673,859.61