Finding the Third Proportional to 3,978,051 and 8,589,968

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978,051 : 8,589,968 = 8,589,968 : x
2. Step 2: Convert to fraction form
   3,978,051/8,589,968 = 8,589,968/x
3. Step 3: Cross multiply
   3,978,051x = 8,589,968 × 8,589,968
4. Step 4: Simplify right side
   3,978,051x = 73,787,550,241,024
5. Step 5: Solve for x
   x = 73,787,550,241,024/3,978,051
6. Step 6: Final answer
   x = 18,548,668.74