Finding the Third Proportional to 807,631 and 1,267,111

Step by Step Solution

1. Step 1: Write the proportion equation
   807,631 : 1,267,111 = 1,267,111 : x
2. Step 2: Convert to fraction form
   807,631/1,267,111 = 1,267,111/x
3. Step 3: Cross multiply
   807,631x = 1,267,111 × 1,267,111
4. Step 4: Simplify right side
   807,631x = 1,605,570,286,321
5. Step 5: Solve for x
   x = 1,605,570,286,321/807,631
6. Step 6: Final answer
   x = 1,987,999.82