Finding the Third Proportional to 140,728 and 308,804

Step by Step Solution

1. Step 1: Write the proportion equation
   140,728 : 308,804 = 308,804 : x
2. Step 2: Convert to fraction form
   140,728/308,804 = 308,804/x
3. Step 3: Cross multiply
   140,728x = 308,804 × 308,804
4. Step 4: Simplify right side
   140,728x = 95,359,910,416
5. Step 5: Solve for x
   x = 95,359,910,416/140,728
6. Step 6: Final answer
   x = 677,618.60