Finding the Third Proportional to 856,289 and 1,863,320

Step by Step Solution

1. Step 1: Write the proportion equation
   856,289 : 1,863,320 = 1,863,320 : x
2. Step 2: Convert to fraction form
   856,289/1,863,320 = 1,863,320/x
3. Step 3: Cross multiply
   856,289x = 1,863,320 × 1,863,320
4. Step 4: Simplify right side
   856,289x = 3,471,961,422,400
5. Step 5: Solve for x
   x = 3,471,961,422,400/856,289
6. Step 6: Final answer
   x = 4,054,660.78