Finding the Third Proportional to 2,115,404 and 4,567,420

Step by Step Solution

1. Step 1: Write the proportion equation
   2,115,404 : 4,567,420 = 4,567,420 : x
2. Step 2: Convert to fraction form
   2,115,404/4,567,420 = 4,567,420/x
3. Step 3: Cross multiply
   2,115,404x = 4,567,420 × 4,567,420
4. Step 4: Simplify right side
   2,115,404x = 20,861,325,456,400
5. Step 5: Solve for x
   x = 20,861,325,456,400/2,115,404
6. Step 6: Final answer
   x = 9,861,627.12