Finding the Third Proportional to 1,388,661 and 2,164,182

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,661 : 2,164,182 = 2,164,182 : x
2. Step 2: Convert to fraction form
   1,388,661/2,164,182 = 2,164,182/x
3. Step 3: Cross multiply
   1,388,661x = 2,164,182 × 2,164,182
4. Step 4: Simplify right side
   1,388,661x = 4,683,683,729,124
5. Step 5: Solve for x
   x = 4,683,683,729,124/1,388,661
6. Step 6: Final answer
   x = 3,372,805.69