Finding the Third Proportional to 807,742 and 1,267,216

Step by Step Solution

1. Step 1: Write the proportion equation
   807,742 : 1,267,216 = 1,267,216 : x
2. Step 2: Convert to fraction form
   807,742/1,267,216 = 1,267,216/x
3. Step 3: Cross multiply
   807,742x = 1,267,216 × 1,267,216
4. Step 4: Simplify right side
   807,742x = 1,605,836,390,656
5. Step 5: Solve for x
   x = 1,605,836,390,656/807,742
6. Step 6: Final answer
   x = 1,988,056.08