Finding the Third Proportional to 300,894 and 648,810

Step by Step Solution

1. Step 1: Write the proportion equation
   300,894 : 648,810 = 648,810 : x
2. Step 2: Convert to fraction form
   300,894/648,810 = 648,810/x
3. Step 3: Cross multiply
   300,894x = 648,810 × 648,810
4. Step 4: Simplify right side
   300,894x = 420,954,416,100
5. Step 5: Solve for x
   x = 420,954,416,100/300,894
6. Step 6: Final answer
   x = 1,399,012.33