Finding the Third Proportional to 8,378,048 and 12,807,642

Step by Step Solution

1. Step 1: Write the proportion equation
   8,378,048 : 12,807,642 = 12,807,642 : x
2. Step 2: Convert to fraction form
   8,378,048/12,807,642 = 12,807,642/x
3. Step 3: Cross multiply
   8,378,048x = 12,807,642 × 12,807,642
4. Step 4: Simplify right side
   8,378,048x = 164,035,693,600,164
5. Step 5: Solve for x
   x = 164,035,693,600,164/8,378,048
6. Step 6: Final answer
   x = 19,579,225.81