Finding the Third Proportional to 399,571 and 849,996

Step by Step Solution

1. Step 1: Write the proportion equation
   399,571 : 849,996 = 849,996 : x
2. Step 2: Convert to fraction form
   399,571/849,996 = 849,996/x
3. Step 3: Cross multiply
   399,571x = 849,996 × 849,996
4. Step 4: Simplify right side
   399,571x = 722,493,200,016
5. Step 5: Solve for x
   x = 722,493,200,016/399,571
6. Step 6: Final answer
   x = 1,808,172.26