Finding the Third Proportional to 858,558 and 1,864,620

Step by Step Solution

1. Step 1: Write the proportion equation
   858,558 : 1,864,620 = 1,864,620 : x
2. Step 2: Convert to fraction form
   858,558/1,864,620 = 1,864,620/x
3. Step 3: Cross multiply
   858,558x = 1,864,620 × 1,864,620
4. Step 4: Simplify right side
   858,558x = 3,476,807,744,400
5. Step 5: Solve for x
   x = 3,476,807,744,400/858,558
6. Step 6: Final answer
   x = 4,049,589.83