Finding the Third Proportional to 389,617 and 845,666

Step by Step Solution

1. Step 1: Write the proportion equation
   389,617 : 845,666 = 845,666 : x
2. Step 2: Convert to fraction form
   389,617/845,666 = 845,666/x
3. Step 3: Cross multiply
   389,617x = 845,666 × 845,666
4. Step 4: Simplify right side
   389,617x = 715,150,983,556
5. Step 5: Solve for x
   x = 715,150,983,556/389,617
6. Step 6: Final answer
   x = 1,835,523.05