Finding the Third Proportional to 2,620,605 and 5,556,138

Step by Step Solution

1. Step 1: Write the proportion equation
   2,620,605 : 5,556,138 = 5,556,138 : x
2. Step 2: Convert to fraction form
   2,620,605/5,556,138 = 5,556,138/x
3. Step 3: Cross multiply
   2,620,605x = 5,556,138 × 5,556,138
4. Step 4: Simplify right side
   2,620,605x = 30,870,669,475,044
5. Step 5: Solve for x
   x = 30,870,669,475,044/2,620,605
6. Step 6: Final answer
   x = 11,779,978.09