Finding the Third Proportional to 1,399,578 and 2,228,085

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399,578 : 2,228,085 = 2,228,085 : x
2. Step 2: Convert to fraction form
   1,399,578/2,228,085 = 2,228,085/x
3. Step 3: Cross multiply
   1,399,578x = 2,228,085 × 2,228,085
4. Step 4: Simplify right side
   1,399,578x = 4,964,362,767,225
5. Step 5: Solve for x
   x = 4,964,362,767,225/1,399,578
6. Step 6: Final answer
   x = 3,547,042.59