Finding the Third Proportional to 2,587,144 and 5,442,389

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587,144 : 5,442,389 = 5,442,389 : x
2. Step 2: Convert to fraction form
   2,587,144/5,442,389 = 5,442,389/x
3. Step 3: Cross multiply
   2,587,144x = 5,442,389 × 5,442,389
4. Step 4: Simplify right side
   2,587,144x = 29,619,598,027,321
5. Step 5: Solve for x
   x = 29,619,598,027,321/2,587,144
6. Step 6: Final answer
   x = 11,448,762.82