Finding the Third Proportional to 642,876 and 1,400,042

Step by Step Solution

1. Step 1: Write the proportion equation
   642,876 : 1,400,042 = 1,400,042 : x
2. Step 2: Convert to fraction form
   642,876/1,400,042 = 1,400,042/x
3. Step 3: Cross multiply
   642,876x = 1,400,042 × 1,400,042
4. Step 4: Simplify right side
   642,876x = 1,960,117,601,764
5. Step 5: Solve for x
   x = 1,960,117,601,764/642,876
6. Step 6: Final answer
   x = 3,048,982.39