Finding the Third Proportional to 143,328 and 313,932

Step by Step Solution

1. Step 1: Write the proportion equation
   143,328 : 313,932 = 313,932 : x
2. Step 2: Convert to fraction form
   143,328/313,932 = 313,932/x
3. Step 3: Cross multiply
   143,328x = 313,932 × 313,932
4. Step 4: Simplify right side
   143,328x = 98,553,300,624
5. Step 5: Solve for x
   x = 98,553,300,624/143,328
6. Step 6: Final answer
   x = 687,606.75