Finding the Third Proportional to 1,328,939 and 1,992,999

Step by Step Solution

1. Step 1: Write the proportion equation
   1,328,939 : 1,992,999 = 1,992,999 : x
2. Step 2: Convert to fraction form
   1,328,939/1,992,999 = 1,992,999/x
3. Step 3: Cross multiply
   1,328,939x = 1,992,999 × 1,992,999
4. Step 4: Simplify right side
   1,328,939x = 3,972,045,014,001
5. Step 5: Solve for x
   x = 3,972,045,014,001/1,328,939
6. Step 6: Final answer
   x = 2,988,884.38