Finding the Third Proportional to 300,861 and 660,766.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,861 : 660,766.50 = 660,766.50 : x
2. Step 2: Convert to fraction form
   300,861/660,766.50 = 660,766.50/x
3. Step 3: Cross multiply
   300,861x = 660,766.50 × 660,766.50
4. Step 4: Simplify right side
   300,861x = 436,612,367,522.25
5. Step 5: Solve for x
   x = 436,612,367,522.25/300,861
6. Step 6: Final answer
   x = 1,451,209.59