Finding the Third Proportional to 143,902.50 and 308,949

Step by Step Solution

1. Step 1: Write the proportion equation
   143,902.50 : 308,949 = 308,949 : x
2. Step 2: Convert to fraction form
   143,902.50/308,949 = 308,949/x
3. Step 3: Cross multiply
   143,902.50x = 308,949 × 308,949
4. Step 4: Simplify right side
   143,902.50x = 95,449,484,601
5. Step 5: Solve for x
   x = 95,449,484,601/143,902.50
6. Step 6: Final answer
   x = 663,292.75