Finding the Third Proportional to 300,770.72 and 668,789.16

Step by Step Solution

1. Step 1: Write the proportion equation
   300,770.72 : 668,789.16 = 668,789.16 : x
2. Step 2: Convert to fraction form
   300,770.72/668,789.16 = 668,789.16/x
3. Step 3: Cross multiply
   300,770.72x = 668,789.16 × 668,789.16
4. Step 4: Simplify right side
   300,770.72x = 447,278,935,517.59
5. Step 5: Solve for x
   x = 447,278,935,517.59/300,770.72
6. Step 6: Final answer
   x = 1,487,109.31