Finding the Third Proportional to 145,812 and 317,976

Step by Step Solution

1. Step 1: Write the proportion equation
   145,812 : 317,976 = 317,976 : x
2. Step 2: Convert to fraction form
   145,812/317,976 = 317,976/x
3. Step 3: Cross multiply
   145,812x = 317,976 × 317,976
4. Step 4: Simplify right side
   145,812x = 101,108,736,576
5. Step 5: Solve for x
   x = 101,108,736,576/145,812
6. Step 6: Final answer
   x = 693,418.49