Finding the Third Proportional to 3,978,053 and 8,589,972

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978,053 : 8,589,972 = 8,589,972 : x
2. Step 2: Convert to fraction form
   3,978,053/8,589,972 = 8,589,972/x
3. Step 3: Cross multiply
   3,978,053x = 8,589,972 × 8,589,972
4. Step 4: Simplify right side
   3,978,053x = 73,787,618,960,784
5. Step 5: Solve for x
   x = 73,787,618,960,784/3,978,053
6. Step 6: Final answer
   x = 18,548,676.69