Finding the Third Proportional to 156,720 and 329,568

Step by Step Solution

1. Step 1: Write the proportion equation
   156,720 : 329,568 = 329,568 : x
2. Step 2: Convert to fraction form
   156,720/329,568 = 329,568/x
3. Step 3: Cross multiply
   156,720x = 329,568 × 329,568
4. Step 4: Simplify right side
   156,720x = 108,615,066,624
5. Step 5: Solve for x
   x = 108,615,066,624/156,720
6. Step 6: Final answer
   x = 693,051.73