Finding the Third Proportional to 807,729 and 1,267,200

Step by Step Solution

1. Step 1: Write the proportion equation
   807,729 : 1,267,200 = 1,267,200 : x
2. Step 2: Convert to fraction form
   807,729/1,267,200 = 1,267,200/x
3. Step 3: Cross multiply
   807,729x = 1,267,200 × 1,267,200
4. Step 4: Simplify right side
   807,729x = 1,605,795,840,000
5. Step 5: Solve for x
   x = 1,605,795,840,000/807,729
6. Step 6: Final answer
   x = 1,988,037.87