Finding the Third Proportional to 1,215,972 and 1,871,766

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,972 : 1,871,766 = 1,871,766 : x
2. Step 2: Convert to fraction form
   1,215,972/1,871,766 = 1,871,766/x
3. Step 3: Cross multiply
   1,215,972x = 1,871,766 × 1,871,766
4. Step 4: Simplify right side
   1,215,972x = 3,503,507,958,756
5. Step 5: Solve for x
   x = 3,503,507,958,756/1,215,972
6. Step 6: Final answer
   x = 2,881,240.65