Finding the Third Proportional to 5,470,689 and 12,663,666

Step by Step Solution

1. Step 1: Write the proportion equation
   5,470,689 : 12,663,666 = 12,663,666 : x
2. Step 2: Convert to fraction form
   5,470,689/12,663,666 = 12,663,666/x
3. Step 3: Cross multiply
   5,470,689x = 12,663,666 × 12,663,666
4. Step 4: Simplify right side
   5,470,689x = 160,368,436,559,556
5. Step 5: Solve for x
   x = 160,368,436,559,556/5,470,689
6. Step 6: Final answer
   x = 29,314,120.50