Finding the Third Proportional to 145,974 and 315,936

Step by Step Solution

1. Step 1: Write the proportion equation
   145,974 : 315,936 = 315,936 : x
2. Step 2: Convert to fraction form
   145,974/315,936 = 315,936/x
3. Step 3: Cross multiply
   145,974x = 315,936 × 315,936
4. Step 4: Simplify right side
   145,974x = 99,815,556,096
5. Step 5: Solve for x
   x = 99,815,556,096/145,974
6. Step 6: Final answer
   x = 683,789.96