Finding the Third Proportional to 2,587,149 and 5,442,399

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587,149 : 5,442,399 = 5,442,399 : x
2. Step 2: Convert to fraction form
   2,587,149/5,442,399 = 5,442,399/x
3. Step 3: Cross multiply
   2,587,149x = 5,442,399 × 5,442,399
4. Step 4: Simplify right side
   2,587,149x = 29,619,706,875,201
5. Step 5: Solve for x
   x = 29,619,706,875,201/2,587,149
6. Step 6: Final answer
   x = 11,448,782.76