Finding the Third Proportional to 677,522 and 990,836

Step by Step Solution

1. Step 1: Write the proportion equation
   677,522 : 990,836 = 990,836 : x
2. Step 2: Convert to fraction form
   677,522/990,836 = 990,836/x
3. Step 3: Cross multiply
   677,522x = 990,836 × 990,836
4. Step 4: Simplify right side
   677,522x = 981,755,978,896
5. Step 5: Solve for x
   x = 981,755,978,896/677,522
6. Step 6: Final answer
   x = 1,449,039.26