Finding the Third Proportional to 485,598 and 990,456

Step by Step Solution

1. Step 1: Write the proportion equation
   485,598 : 990,456 = 990,456 : x
2. Step 2: Convert to fraction form
   485,598/990,456 = 990,456/x
3. Step 3: Cross multiply
   485,598x = 990,456 × 990,456
4. Step 4: Simplify right side
   485,598x = 981,003,087,936
5. Step 5: Solve for x
   x = 981,003,087,936/485,598
6. Step 6: Final answer
   x = 2,020,195.90