Finding the Third Proportional to 1,388,742 and 2,164,305

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,742 : 2,164,305 = 2,164,305 : x
2. Step 2: Convert to fraction form
   1,388,742/2,164,305 = 2,164,305/x
3. Step 3: Cross multiply
   1,388,742x = 2,164,305 × 2,164,305
4. Step 4: Simplify right side
   1,388,742x = 4,684,216,133,025
5. Step 5: Solve for x
   x = 4,684,216,133,025/1,388,742
6. Step 6: Final answer
   x = 3,372,992.34