Finding the Third Proportional to 1,214,556 and 1,815,142

Step by Step Solution

1. Step 1: Write the proportion equation
   1,214,556 : 1,815,142 = 1,815,142 : x
2. Step 2: Convert to fraction form
   1,214,556/1,815,142 = 1,815,142/x
3. Step 3: Cross multiply
   1,214,556x = 1,815,142 × 1,815,142
4. Step 4: Simplify right side
   1,214,556x = 3,294,740,480,164
5. Step 5: Solve for x
   x = 3,294,740,480,164/1,214,556
6. Step 6: Final answer
   x = 2,712,711.87