Finding the Third Proportional to 1,259,728 and 1,912,920

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259,728 : 1,912,920 = 1,912,920 : x
2. Step 2: Convert to fraction form
   1,259,728/1,912,920 = 1,912,920/x
3. Step 3: Cross multiply
   1,259,728x = 1,912,920 × 1,912,920
4. Step 4: Simplify right side
   1,259,728x = 3,659,262,926,400
5. Step 5: Solve for x
   x = 3,659,262,926,400/1,259,728
6. Step 6: Final answer
   x = 2,904,803.99