Finding the Third Proportional to 389,542.50 and 608,916

Step by Step Solution

1. Step 1: Write the proportion equation
   389,542.50 : 608,916 = 608,916 : x
2. Step 2: Convert to fraction form
   389,542.50/608,916 = 608,916/x
3. Step 3: Cross multiply
   389,542.50x = 608,916 × 608,916
4. Step 4: Simplify right side
   389,542.50x = 370,778,695,056
5. Step 5: Solve for x
   x = 370,778,695,056/389,542.50
6. Step 6: Final answer
   x = 951,831.17