Finding the Third Proportional to 1,198,697 and 2,131,143

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198,697 : 2,131,143 = 2,131,143 : x
2. Step 2: Convert to fraction form
   1,198,697/2,131,143 = 2,131,143/x
3. Step 3: Cross multiply
   1,198,697x = 2,131,143 × 2,131,143
4. Step 4: Simplify right side
   1,198,697x = 4,541,770,486,449
5. Step 5: Solve for x
   x = 4,541,770,486,449/1,198,697
6. Step 6: Final answer
   x = 3,788,922.88