Finding the Third Proportional to 158,931 and 330,799.50

Step by Step Solution

1. Step 1: Write the proportion equation
   158,931 : 330,799.50 = 330,799.50 : x
2. Step 2: Convert to fraction form
   158,931/330,799.50 = 330,799.50/x
3. Step 3: Cross multiply
   158,931x = 330,799.50 × 330,799.50
4. Step 4: Simplify right side
   158,931x = 109,428,309,200.25
5. Step 5: Solve for x
   x = 109,428,309,200.25/158,931
6. Step 6: Final answer
   x = 688,527.15