Finding the Third Proportional to 1,338,578 and 2,039,236

Step by Step Solution

1. Step 1: Write the proportion equation
   1,338,578 : 2,039,236 = 2,039,236 : x
2. Step 2: Convert to fraction form
   1,338,578/2,039,236 = 2,039,236/x
3. Step 3: Cross multiply
   1,338,578x = 2,039,236 × 2,039,236
4. Step 4: Simplify right side
   1,338,578x = 4,158,483,463,696
5. Step 5: Solve for x
   x = 4,158,483,463,696/1,338,578
6. Step 6: Final answer
   x = 3,106,642.62