Finding the Third Proportional to 853,690 and 1,864,820

Step by Step Solution

1. Step 1: Write the proportion equation
   853,690 : 1,864,820 = 1,864,820 : x
2. Step 2: Convert to fraction form
   853,690/1,864,820 = 1,864,820/x
3. Step 3: Cross multiply
   853,690x = 1,864,820 × 1,864,820
4. Step 4: Simplify right side
   853,690x = 3,477,553,632,400
5. Step 5: Solve for x
   x = 3,477,553,632,400/853,690
6. Step 6: Final answer
   x = 4,073,555.54