Finding the Third Proportional to 158,388 and 329,836

Step by Step Solution

1. Step 1: Write the proportion equation
   158,388 : 329,836 = 329,836 : x
2. Step 2: Convert to fraction form
   158,388/329,836 = 329,836/x
3. Step 3: Cross multiply
   158,388x = 329,836 × 329,836
4. Step 4: Simplify right side
   158,388x = 108,791,786,896
5. Step 5: Solve for x
   x = 108,791,786,896/158,388
6. Step 6: Final answer
   x = 686,868.87