Finding the Third Proportional to 857,900 and 1,865,218

Step by Step Solution

1. Step 1: Write the proportion equation
   857,900 : 1,865,218 = 1,865,218 : x
2. Step 2: Convert to fraction form
   857,900/1,865,218 = 1,865,218/x
3. Step 3: Cross multiply
   857,900x = 1,865,218 × 1,865,218
4. Step 4: Simplify right side
   857,900x = 3,479,038,187,524
5. Step 5: Solve for x
   x = 3,479,038,187,524/857,900
6. Step 6: Final answer
   x = 4,055,295.71