Finding the Third Proportional to 858,640 and 1,864,808

Step by Step Solution

1. Step 1: Write the proportion equation
   858,640 : 1,864,808 = 1,864,808 : x
2. Step 2: Convert to fraction form
   858,640/1,864,808 = 1,864,808/x
3. Step 3: Cross multiply
   858,640x = 1,864,808 × 1,864,808
4. Step 4: Simplify right side
   858,640x = 3,477,508,876,864
5. Step 5: Solve for x
   x = 3,477,508,876,864/858,640
6. Step 6: Final answer
   x = 4,050,019.66