Finding the Third Proportional to 3,980,270 and 8,705,200

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980,270 : 8,705,200 = 8,705,200 : x
2. Step 2: Convert to fraction form
   3,980,270/8,705,200 = 8,705,200/x
3. Step 3: Cross multiply
   3,980,270x = 8,705,200 × 8,705,200
4. Step 4: Simplify right side
   3,980,270x = 75,780,507,040,000
5. Step 5: Solve for x
   x = 75,780,507,040,000/3,980,270
6. Step 6: Final answer
   x = 19,039,036.81