Finding the Third Proportional to 7,981,672 and 12,171,786

Step by Step Solution

1. Step 1: Write the proportion equation
   7,981,672 : 12,171,786 = 12,171,786 : x
2. Step 2: Convert to fraction form
   7,981,672/12,171,786 = 12,171,786/x
3. Step 3: Cross multiply
   7,981,672x = 12,171,786 × 12,171,786
4. Step 4: Simplify right side
   7,981,672x = 148,152,374,429,796
5. Step 5: Solve for x
   x = 148,152,374,429,796/7,981,672
6. Step 6: Final answer
   x = 18,561,571.36