Finding the Third Proportional to 300,861.50 and 660,775.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,861.50 : 660,775.50 = 660,775.50 : x
2. Step 2: Convert to fraction form
   300,861.50/660,775.50 = 660,775.50/x
3. Step 3: Cross multiply
   300,861.50x = 660,775.50 × 660,775.50
4. Step 4: Simplify right side
   300,861.50x = 436,624,261,400.25
5. Step 5: Solve for x
   x = 436,624,261,400.25/300,861.50
6. Step 6: Final answer
   x = 1,451,246.71