Finding the Third Proportional to 143,223 and 315,048

Step by Step Solution

1. Step 1: Write the proportion equation
   143,223 : 315,048 = 315,048 : x
2. Step 2: Convert to fraction form
   143,223/315,048 = 315,048/x
3. Step 3: Cross multiply
   143,223x = 315,048 × 315,048
4. Step 4: Simplify right side
   143,223x = 99,255,242,304
5. Step 5: Solve for x
   x = 99,255,242,304/143,223
6. Step 6: Final answer
   x = 693,011.89