Finding the Third Proportional to 485,516 and 990,308

Step by Step Solution

1. Step 1: Write the proportion equation
   485,516 : 990,308 = 990,308 : x
2. Step 2: Convert to fraction form
   485,516/990,308 = 990,308/x
3. Step 3: Cross multiply
   485,516x = 990,308 × 990,308
4. Step 4: Simplify right side
   485,516x = 980,709,934,864
5. Step 5: Solve for x
   x = 980,709,934,864/485,516
6. Step 6: Final answer
   x = 2,019,933.30