Finding the Third Proportional to 3,990,630 and 8,726,592

Step by Step Solution

1. Step 1: Write the proportion equation
   3,990,630 : 8,726,592 = 8,726,592 : x
2. Step 2: Convert to fraction form
   3,990,630/8,726,592 = 8,726,592/x
3. Step 3: Cross multiply
   3,990,630x = 8,726,592 × 8,726,592
4. Step 4: Simplify right side
   3,990,630x = 76,153,407,934,464
5. Step 5: Solve for x
   x = 76,153,407,934,464/3,990,630
6. Step 6: Final answer
   x = 19,083,054.04