Finding the Third Proportional to 300,777 and 668,800.50

Step by Step Solution

1. Step 1: Write the proportion equation
   300,777 : 668,800.50 = 668,800.50 : x
2. Step 2: Convert to fraction form
   300,777/668,800.50 = 668,800.50/x
3. Step 3: Cross multiply
   300,777x = 668,800.50 × 668,800.50
4. Step 4: Simplify right side
   300,777x = 447,294,108,800.25
5. Step 5: Solve for x
   x = 447,294,108,800.25/300,777
6. Step 6: Final answer
   x = 1,487,128.70