Finding the Third Proportional to 3,978,052 and 8,589,969

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978,052 : 8,589,969 = 8,589,969 : x
2. Step 2: Convert to fraction form
   3,978,052/8,589,969 = 8,589,969/x
3. Step 3: Cross multiply
   3,978,052x = 8,589,969 × 8,589,969
4. Step 4: Simplify right side
   3,978,052x = 73,787,567,420,961
5. Step 5: Solve for x
   x = 73,787,567,420,961/3,978,052
6. Step 6: Final answer
   x = 18,548,668.40