Finding the Third Proportional to 4,207,268 and 9,215,404

Step by Step Solution

1. Step 1: Write the proportion equation
   4,207,268 : 9,215,404 = 9,215,404 : x
2. Step 2: Convert to fraction form
   4,207,268/9,215,404 = 9,215,404/x
3. Step 3: Cross multiply
   4,207,268x = 9,215,404 × 9,215,404
4. Step 4: Simplify right side
   4,207,268x = 84,923,670,883,216
5. Step 5: Solve for x
   x = 84,923,670,883,216/4,207,268
6. Step 6: Final answer
   x = 20,184,991.99