Finding the Third Proportional to 158,870.50 and 330,809

Step by Step Solution

1. Step 1: Write the proportion equation
   158,870.50 : 330,809 = 330,809 : x
2. Step 2: Convert to fraction form
   158,870.50/330,809 = 330,809/x
3. Step 3: Cross multiply
   158,870.50x = 330,809 × 330,809
4. Step 4: Simplify right side
   158,870.50x = 109,434,594,481
5. Step 5: Solve for x
   x = 109,434,594,481/158,870.50
6. Step 6: Final answer
   x = 688,828.92