Finding the Third Proportional to 807,780 and 1,267,272

Step by Step Solution

1. Step 1: Write the proportion equation
   807,780 : 1,267,272 = 1,267,272 : x
2. Step 2: Convert to fraction form
   807,780/1,267,272 = 1,267,272/x
3. Step 3: Cross multiply
   807,780x = 1,267,272 × 1,267,272
4. Step 4: Simplify right side
   807,780x = 1,605,978,321,984
5. Step 5: Solve for x
   x = 1,605,978,321,984/807,780
6. Step 6: Final answer
   x = 1,988,138.26