Finding the Third Proportional to 1,969,978 and 4,313,621

Step by Step Solution

1. Step 1: Write the proportion equation
   1,969,978 : 4,313,621 = 4,313,621 : x
2. Step 2: Convert to fraction form
   1,969,978/4,313,621 = 4,313,621/x
3. Step 3: Cross multiply
   1,969,978x = 4,313,621 × 4,313,621
4. Step 4: Simplify right side
   1,969,978x = 18,607,326,131,641
5. Step 5: Solve for x
   x = 18,607,326,131,641/1,969,978
6. Step 6: Final answer
   x = 9,445,448.70