Finding the Third Proportional to 8,378,967 and 12,812,111

Step by Step Solution

1. Step 1: Write the proportion equation
   8,378,967 : 12,812,111 = 12,812,111 : x
2. Step 2: Convert to fraction form
   8,378,967/12,812,111 = 12,812,111/x
3. Step 3: Cross multiply
   8,378,967x = 12,812,111 × 12,812,111
4. Step 4: Simplify right side
   8,378,967x = 164,150,188,276,321
5. Step 5: Solve for x
   x = 164,150,188,276,321/8,378,967
6. Step 6: Final answer
   x = 19,590,742.90