Finding the Third Proportional to 1,987,911 and 4,327,778

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987,911 : 4,327,778 = 4,327,778 : x
2. Step 2: Convert to fraction form
   1,987,911/4,327,778 = 4,327,778/x
3. Step 3: Cross multiply
   1,987,911x = 4,327,778 × 4,327,778
4. Step 4: Simplify right side
   1,987,911x = 18,729,662,417,284
5. Step 5: Solve for x
   x = 18,729,662,417,284/1,987,911
6. Step 6: Final answer
   x = 9,421,781.16