Finding the Third Proportional to 1,388,744 and 2,164,308

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,744 : 2,164,308 = 2,164,308 : x
2. Step 2: Convert to fraction form
   1,388,744/2,164,308 = 2,164,308/x
3. Step 3: Cross multiply
   1,388,744x = 2,164,308 × 2,164,308
4. Step 4: Simplify right side
   1,388,744x = 4,684,229,118,864
5. Step 5: Solve for x
   x = 4,684,229,118,864/1,388,744
6. Step 6: Final answer
   x = 3,372,996.84