Finding the Third Proportional to 3,978,047 and 8,589,960

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978,047 : 8,589,960 = 8,589,960 : x
2. Step 2: Convert to fraction form
   3,978,047/8,589,960 = 8,589,960/x
3. Step 3: Cross multiply
   3,978,047x = 8,589,960 × 8,589,960
4. Step 4: Simplify right side
   3,978,047x = 73,787,412,801,600
5. Step 5: Solve for x
   x = 73,787,412,801,600/3,978,047
6. Step 6: Final answer
   x = 18,548,652.84