Finding the Third Proportional to 300,835.50 and 660,720

Step by Step Solution

1. Step 1: Write the proportion equation
   300,835.50 : 660,720 = 660,720 : x
2. Step 2: Convert to fraction form
   300,835.50/660,720 = 660,720/x
3. Step 3: Cross multiply
   300,835.50x = 660,720 × 660,720
4. Step 4: Simplify right side
   300,835.50x = 436,550,918,400
5. Step 5: Solve for x
   x = 436,550,918,400/300,835.50
6. Step 6: Final answer
   x = 1,451,128.34