Finding the Third Proportional to 143,332 and 311,540

Step by Step Solution

1. Step 1: Write the proportion equation
   143,332 : 311,540 = 311,540 : x
2. Step 2: Convert to fraction form
   143,332/311,540 = 311,540/x
3. Step 3: Cross multiply
   143,332x = 311,540 × 311,540
4. Step 4: Simplify right side
   143,332x = 97,057,171,600
5. Step 5: Solve for x
   x = 97,057,171,600/143,332
6. Step 6: Final answer
   x = 677,149.36