Finding the Third Proportional to 3,978,054 and 8,589,973

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978,054 : 8,589,973 = 8,589,973 : x
2. Step 2: Convert to fraction form
   3,978,054/8,589,973 = 8,589,973/x
3. Step 3: Cross multiply
   3,978,054x = 8,589,973 × 8,589,973
4. Step 4: Simplify right side
   3,978,054x = 73,787,636,140,729
5. Step 5: Solve for x
   x = 73,787,636,140,729/3,978,054
6. Step 6: Final answer
   x = 18,548,676.35