Finding the Third Proportional to 3,947,616 and 8,609,166

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947,616 : 8,609,166 = 8,609,166 : x
2. Step 2: Convert to fraction form
   3,947,616/8,609,166 = 8,609,166/x
3. Step 3: Cross multiply
   3,947,616x = 8,609,166 × 8,609,166
4. Step 4: Simplify right side
   3,947,616x = 74,117,739,215,556
5. Step 5: Solve for x
   x = 74,117,739,215,556/3,947,616
6. Step 6: Final answer
   x = 18,775,316.35