Finding the Third Proportional to 643,722 and 1,398,063

Step by Step Solution

1. Step 1: Write the proportion equation
   643,722 : 1,398,063 = 1,398,063 : x
2. Step 2: Convert to fraction form
   643,722/1,398,063 = 1,398,063/x
3. Step 3: Cross multiply
   643,722x = 1,398,063 × 1,398,063
4. Step 4: Simplify right side
   643,722x = 1,954,580,151,969
5. Step 5: Solve for x
   x = 1,954,580,151,969/643,722
6. Step 6: Final answer
   x = 3,036,373.08