Finding the Third Proportional to 389,574 and 608,978

Step by Step Solution

1. Step 1: Write the proportion equation
   389,574 : 608,978 = 608,978 : x
2. Step 2: Convert to fraction form
   389,574/608,978 = 608,978/x
3. Step 3: Cross multiply
   389,574x = 608,978 × 608,978
4. Step 4: Simplify right side
   389,574x = 370,854,204,484
5. Step 5: Solve for x
   x = 370,854,204,484/389,574
6. Step 6: Final answer
   x = 951,948.04