Finding the Third Proportional to 1,990,412 and 4,264,788

Step by Step Solution

1. Step 1: Write the proportion equation
   1,990,412 : 4,264,788 = 4,264,788 : x
2. Step 2: Convert to fraction form
   1,990,412/4,264,788 = 4,264,788/x
3. Step 3: Cross multiply
   1,990,412x = 4,264,788 × 4,264,788
4. Step 4: Simplify right side
   1,990,412x = 18,188,416,684,944
5. Step 5: Solve for x
   x = 18,188,416,684,944/1,990,412
6. Step 6: Final answer
   x = 9,138,015.99