Finding the Third Proportional to 8,276,778 and 12,769,443

Step by Step Solution

1. Step 1: Write the proportion equation
   8,276,778 : 12,769,443 = 12,769,443 : x
2. Step 2: Convert to fraction form
   8,276,778/12,769,443 = 12,769,443/x
3. Step 3: Cross multiply
   8,276,778x = 12,769,443 × 12,769,443
4. Step 4: Simplify right side
   8,276,778x = 163,058,674,530,249
5. Step 5: Solve for x
   x = 163,058,674,530,249/8,276,778
6. Step 6: Final answer
   x = 19,700,742.79