Finding the Third Proportional to 143,233 and 315,066

Step by Step Solution

1. Step 1: Write the proportion equation
   143,233 : 315,066 = 315,066 : x
2. Step 2: Convert to fraction form
   143,233/315,066 = 315,066/x
3. Step 3: Cross multiply
   143,233x = 315,066 × 315,066
4. Step 4: Simplify right side
   143,233x = 99,266,584,356
5. Step 5: Solve for x
   x = 99,266,584,356/143,233
6. Step 6: Final answer
   x = 693,042.70