Finding the Third Proportional to 1,388,696 and 2,164,242

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388,696 : 2,164,242 = 2,164,242 : x
2. Step 2: Convert to fraction form
   1,388,696/2,164,242 = 2,164,242/x
3. Step 3: Cross multiply
   1,388,696x = 2,164,242 × 2,164,242
4. Step 4: Simplify right side
   1,388,696x = 4,683,943,434,564
5. Step 5: Solve for x
   x = 4,683,943,434,564/1,388,696
6. Step 6: Final answer
   x = 3,372,907.70