Finding the Third Proportional to 1,990,404 and 4,264,772

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990,404 : 4,264,772 = 4,264,772 : x
2. Step 2: Convert to fraction form
   1,990,404/4,264,772 = 4,264,772/x
3. Step 3: Cross multiply
   1,990,404x = 4,264,772 × 4,264,772
4. Step 4: Simplify right side
   1,990,404x = 18,188,280,211,984
5. Step 5: Solve for x
   x = 18,188,280,211,984/1,990,404
6. Step 6: Final answer
   x = 9,137,984.15