Finding the Third Proportional to 389,505 and 588,469.50

Step by Step Solution

1. Step 1: Write the proportion equation
   389,505 : 588,469.50 = 588,469.50 : x
2. Step 2: Convert to fraction form
   389,505/588,469.50 = 588,469.50/x
3. Step 3: Cross multiply
   389,505x = 588,469.50 × 588,469.50
4. Step 4: Simplify right side
   389,505x = 346,296,352,430.25
5. Step 5: Solve for x
   x = 346,296,352,430.25/389,505
6. Step 6: Final answer
   x = 889,067.80