Finding the Third Proportional to 158,662.50 and 330,445.50

Step by Step Solution

1. Step 1: Write the proportion equation
   158,662.50 : 330,445.50 = 330,445.50 : x
2. Step 2: Convert to fraction form
   158,662.50/330,445.50 = 330,445.50/x
3. Step 3: Cross multiply
   158,662.50x = 330,445.50 × 330,445.50
4. Step 4: Simplify right side
   158,662.50x = 109,194,228,470.25
5. Step 5: Solve for x
   x = 109,194,228,470.25/158,662.50
6. Step 6: Final answer
   x = 688,216.99