Finding the Third Proportional to 300,784.50 and 668,810

Step by Step Solution

1. Step 1: Write the proportion equation
   300,784.50 : 668,810 = 668,810 : x
2. Step 2: Convert to fraction form
   300,784.50/668,810 = 668,810/x
3. Step 3: Cross multiply
   300,784.50x = 668,810 × 668,810
4. Step 4: Simplify right side
   300,784.50x = 447,306,816,100
5. Step 5: Solve for x
   x = 447,306,816,100/300,784.50
6. Step 6: Final answer
   x = 1,487,133.87