Finding the Third Proportional to 158,398.50 and 329,902.50

Step by Step Solution

1. Step 1: Write the proportion equation
   158,398.50 : 329,902.50 = 329,902.50 : x
2. Step 2: Convert to fraction form
   158,398.50/329,902.50 = 329,902.50/x
3. Step 3: Cross multiply
   158,398.50x = 329,902.50 × 329,902.50
4. Step 4: Simplify right side
   158,398.50x = 108,835,659,506.25
5. Step 5: Solve for x
   x = 108,835,659,506.25/158,398.50
6. Step 6: Final answer
   x = 687,100.32