Finding the Third Proportional to 858,840 and 1,865,667

Step by Step Solution

1. Step 1: Write the proportion equation
   858,840 : 1,865,667 = 1,865,667 : x
2. Step 2: Convert to fraction form
   858,840/1,865,667 = 1,865,667/x
3. Step 3: Cross multiply
   858,840x = 1,865,667 × 1,865,667
4. Step 4: Simplify right side
   858,840x = 3,480,713,354,889
5. Step 5: Solve for x
   x = 3,480,713,354,889/858,840
6. Step 6: Final answer
   x = 4,052,807.69