Finding the Third Proportional to 1,278,885 and 2,798,478

Step by Step Solution

1. Step 1: Write the proportion equation
   1,278,885 : 2,798,478 = 2,798,478 : x
2. Step 2: Convert to fraction form
   1,278,885/2,798,478 = 2,798,478/x
3. Step 3: Cross multiply
   1,278,885x = 2,798,478 × 2,798,478
4. Step 4: Simplify right side
   1,278,885x = 7,831,479,116,484
5. Step 5: Solve for x
   x = 7,831,479,116,484/1,278,885
6. Step 6: Final answer
   x = 6,123,677.36