Finding the Third Proportional to 1,378,728 and 2,059,830

Step by Step Solution

1. Step 1: Write the proportion equation
   1,378,728 : 2,059,830 = 2,059,830 : x
2. Step 2: Convert to fraction form
   1,378,728/2,059,830 = 2,059,830/x
3. Step 3: Cross multiply
   1,378,728x = 2,059,830 × 2,059,830
4. Step 4: Simplify right side
   1,378,728x = 4,242,899,628,900
5. Step 5: Solve for x
   x = 4,242,899,628,900/1,378,728
6. Step 6: Final answer
   x = 3,077,401.51