Finding the Third Proportional to 642,874 and 1,400,038

Step by Step Solution

1. Step 1: Write the proportion equation
   642,874 : 1,400,038 = 1,400,038 : x
2. Step 2: Convert to fraction form
   642,874/1,400,038 = 1,400,038/x
3. Step 3: Cross multiply
   642,874x = 1,400,038 × 1,400,038
4. Step 4: Simplify right side
   642,874x = 1,960,106,401,444
5. Step 5: Solve for x
   x = 1,960,106,401,444/642,874
6. Step 6: Final answer
   x = 3,048,974.45