Finding the Third Proportional to 7,990,170 and 12,520,746

Step by Step Solution

1. Step 1: Write the proportion equation
   7,990,170 : 12,520,746 = 12,520,746 : x
2. Step 2: Convert to fraction form
   7,990,170/12,520,746 = 12,520,746/x
3. Step 3: Cross multiply
   7,990,170x = 12,520,746 × 12,520,746
4. Step 4: Simplify right side
   7,990,170x = 156,769,080,396,516
5. Step 5: Solve for x
   x = 156,769,080,396,516/7,990,170
6. Step 6: Final answer
   x = 19,620,243.42