Finding the Third Proportional to 858,657 and 1,864,806

Step by Step Solution

1. Step 1: Write the proportion equation
   858,657 : 1,864,806 = 1,864,806 : x
2. Step 2: Convert to fraction form
   858,657/1,864,806 = 1,864,806/x
3. Step 3: Cross multiply
   858,657x = 1,864,806 × 1,864,806
4. Step 4: Simplify right side
   858,657x = 3,477,501,417,636
5. Step 5: Solve for x
   x = 3,477,501,417,636/858,657
6. Step 6: Final answer
   x = 4,049,930.78