Finding the Third Proportional to 389,559.38 and 582,789.94

Step by Step Solution

1. Step 1: Write the proportion equation
   389,559.38 : 582,789.94 = 582,789.94 : x
2. Step 2: Convert to fraction form
   389,559.38/582,789.94 = 582,789.94/x
3. Step 3: Cross multiply
   389,559.38x = 582,789.94 × 582,789.94
4. Step 4: Simplify right side
   389,559.38x = 339,644,111,251.25
5. Step 5: Solve for x
   x = 339,644,111,251.25/389,559.38
6. Step 6: Final answer
   x = 871,867.38