Finding the Third Proportional to 2,587,143 and 5,442,387

Step by Step Solution

1. Step 1: Write the proportion equation
   2,587,143 : 5,442,387 = 5,442,387 : x
2. Step 2: Convert to fraction form
   2,587,143/5,442,387 = 5,442,387/x
3. Step 3: Cross multiply
   2,587,143x = 5,442,387 × 5,442,387
4. Step 4: Simplify right side
   2,587,143x = 29,619,576,257,769
5. Step 5: Solve for x
   x = 29,619,576,257,769/2,587,143
6. Step 6: Final answer
   x = 11,448,758.83