Finding the Third Proportional to 4,200,910 and 8,555,912

Step by Step Solution

1. Step 1: Write the proportion equation
   4,200,910 : 8,555,912 = 8,555,912 : x
2. Step 2: Convert to fraction form
   4,200,910/8,555,912 = 8,555,912/x
3. Step 3: Cross multiply
   4,200,910x = 8,555,912 × 8,555,912
4. Step 4: Simplify right side
   4,200,910x = 73,203,630,151,744
5. Step 5: Solve for x
   x = 73,203,630,151,744/4,200,910
6. Step 6: Final answer
   x = 17,425,660.19