Finding the Third Proportional to 1,291,644 and 1,991,968

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,644 : 1,991,968 = 1,991,968 : x
2. Step 2: Convert to fraction form
   1,291,644/1,991,968 = 1,991,968/x
3. Step 3: Cross multiply
   1,291,644x = 1,991,968 × 1,991,968
4. Step 4: Simplify right side
   1,291,644x = 3,967,936,513,024
5. Step 5: Solve for x
   x = 3,967,936,513,024/1,291,644
6. Step 6: Final answer
   x = 3,072,004.76