Finding the Third Proportional to 3,932,783 and 8,412,072

Step by Step Solution

1. Step 1: Write the proportion equation
   3,932,783 : 8,412,072 = 8,412,072 : x
2. Step 2: Convert to fraction form
   3,932,783/8,412,072 = 8,412,072/x
3. Step 3: Cross multiply
   3,932,783x = 8,412,072 × 8,412,072
4. Step 4: Simplify right side
   3,932,783x = 70,762,955,333,184
5. Step 5: Solve for x
   x = 70,762,955,333,184/3,932,783
6. Step 6: Final answer
   x = 17,993,099.37