Finding the Third Proportional to 485,604 and 990,468

Step by Step Solution

1. Step 1: Write the proportion equation
   485,604 : 990,468 = 990,468 : x
2. Step 2: Convert to fraction form
   485,604/990,468 = 990,468/x
3. Step 3: Cross multiply
   485,604x = 990,468 × 990,468
4. Step 4: Simplify right side
   485,604x = 981,026,859,024
5. Step 5: Solve for x
   x = 981,026,859,024/485,604
6. Step 6: Final answer
   x = 2,020,219.89