Finding the Third Proportional to 3,430,866 and 7,317,720

Step by Step Solution

1. Step 1: Write the proportion equation
   3,430,866 : 7,317,720 = 7,317,720 : x
2. Step 2: Convert to fraction form
   3,430,866/7,317,720 = 7,317,720/x
3. Step 3: Cross multiply
   3,430,866x = 7,317,720 × 7,317,720
4. Step 4: Simplify right side
   3,430,866x = 53,549,025,998,400
5. Step 5: Solve for x
   x = 53,549,025,998,400/3,430,866
6. Step 6: Final answer
   x = 15,608,020.25