Finding the Third Proportional to 1,988,978 and 4,294,886

Step by Step Solution

1. Step 1: Write the proportion equation
   1,988,978 : 4,294,886 = 4,294,886 : x
2. Step 2: Convert to fraction form
   1,988,978/4,294,886 = 4,294,886/x
3. Step 3: Cross multiply
   1,988,978x = 4,294,886 × 4,294,886
4. Step 4: Simplify right side
   1,988,978x = 18,446,045,752,996
5. Step 5: Solve for x
   x = 18,446,045,752,996/1,988,978
6. Step 6: Final answer
   x = 9,274,132.62