Finding the Third Proportional to 143,072 and 308,287

Step by Step Solution

1. Step 1: Write the proportion equation
   143,072 : 308,287 = 308,287 : x
2. Step 2: Convert to fraction form
   143,072/308,287 = 308,287/x
3. Step 3: Cross multiply
   143,072x = 308,287 × 308,287
4. Step 4: Simplify right side
   143,072x = 95,040,874,369
5. Step 5: Solve for x
   x = 95,040,874,369/143,072
6. Step 6: Final answer
   x = 664,287.03