Finding the Third Proportional to 153,456 and 317,568

Step by Step Solution

1. Step 1: Write the proportion equation
   153,456 : 317,568 = 317,568 : x
2. Step 2: Convert to fraction form
   153,456/317,568 = 317,568/x
3. Step 3: Cross multiply
   153,456x = 317,568 × 317,568
4. Step 4: Simplify right side
   153,456x = 100,849,434,624
5. Step 5: Solve for x
   x = 100,849,434,624/153,456
6. Step 6: Final answer
   x = 657,187.95