Finding the Third Proportional to 1,291,648 and 1,991,974

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,648 : 1,991,974 = 1,991,974 : x
2. Step 2: Convert to fraction form
   1,291,648/1,991,974 = 1,991,974/x
3. Step 3: Cross multiply
   1,291,648x = 1,991,974 × 1,991,974
4. Step 4: Simplify right side
   1,291,648x = 3,967,960,416,676
5. Step 5: Solve for x
   x = 3,967,960,416,676/1,291,648
6. Step 6: Final answer
   x = 3,072,013.75