Finding the Third Proportional to 1,291,652 and 1,991,980

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,652 : 1,991,980 = 1,991,980 : x
2. Step 2: Convert to fraction form
   1,291,652/1,991,980 = 1,991,980/x
3. Step 3: Cross multiply
   1,291,652x = 1,991,980 × 1,991,980
4. Step 4: Simplify right side
   1,291,652x = 3,967,984,320,400
5. Step 5: Solve for x
   x = 3,967,984,320,400/1,291,652
6. Step 6: Final answer
   x = 3,072,022.74