Finding the Third Proportional to 1,018,767 and 1,378,680

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,767 : 1,378,680 = 1,378,680 : x
2. Step 2: Convert to fraction form
   1,018,767/1,378,680 = 1,378,680/x
3. Step 3: Cross multiply
   1,018,767x = 1,378,680 × 1,378,680
4. Step 4: Simplify right side
   1,018,767x = 1,900,758,542,400
5. Step 5: Solve for x
   x = 1,900,758,542,400/1,018,767
6. Step 6: Final answer
   x = 1,865,744.12