Finding the Third Proportional to 2,139,686 and 4,699,212

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139,686 : 4,699,212 = 4,699,212 : x
2. Step 2: Convert to fraction form
   2,139,686/4,699,212 = 4,699,212/x
3. Step 3: Cross multiply
   2,139,686x = 4,699,212 × 4,699,212
4. Step 4: Simplify right side
   2,139,686x = 22,082,593,420,944
5. Step 5: Solve for x
   x = 22,082,593,420,944/2,139,686
6. Step 6: Final answer
   x = 10,320,483.20