Finding the Third Proportional to 143,233.31 and 315,057.09

Step by Step Solution

1. Step 1: Write the proportion equation
   143,233.31 : 315,057.09 = 315,057.09 : x
2. Step 2: Convert to fraction form
   143,233.31/315,057.09 = 315,057.09/x
3. Step 3: Cross multiply
   143,233.31x = 315,057.09 × 315,057.09
4. Step 4: Simplify right side
   143,233.31x = 99,260,972,322.20
5. Step 5: Solve for x
   x = 99,260,972,322.20/143,233.31
6. Step 6: Final answer
   x = 693,002.00