Finding the Third Proportional to 143,571 and 314,749

Step by Step Solution

1. Step 1: Write the proportion equation
   143,571 : 314,749 = 314,749 : x
2. Step 2: Convert to fraction form
   143,571/314,749 = 314,749/x
3. Step 3: Cross multiply
   143,571x = 314,749 × 314,749
4. Step 4: Simplify right side
   143,571x = 99,066,933,001
5. Step 5: Solve for x
   x = 99,066,933,001/143,571
6. Step 6: Final answer
   x = 690,020.50