Finding the Third Proportional to 677,485.50 and 990,786

Step by Step Solution

1. Step 1: Write the proportion equation
   677,485.50 : 990,786 = 990,786 : x
2. Step 2: Convert to fraction form
   677,485.50/990,786 = 990,786/x
3. Step 3: Cross multiply
   677,485.50x = 990,786 × 990,786
4. Step 4: Simplify right side
   677,485.50x = 981,656,897,796
5. Step 5: Solve for x
   x = 981,656,897,796/677,485.50
6. Step 6: Final answer
   x = 1,448,971.08