Finding the Third Proportional to 158,426 and 329,912

Step by Step Solution

1. Step 1: Write the proportion equation
   158,426 : 329,912 = 329,912 : x
2. Step 2: Convert to fraction form
   158,426/329,912 = 329,912/x
3. Step 3: Cross multiply
   158,426x = 329,912 × 329,912
4. Step 4: Simplify right side
   158,426x = 108,841,927,744
5. Step 5: Solve for x
   x = 108,841,927,744/158,426
6. Step 6: Final answer
   x = 687,020.61