Finding the Third Proportional to 851,220 and 1,853,640

Step by Step Solution

1. Step 1: Write the proportion equation
   851,220 : 1,853,640 = 1,853,640 : x
2. Step 2: Convert to fraction form
   851,220/1,853,640 = 1,853,640/x
3. Step 3: Cross multiply
   851,220x = 1,853,640 × 1,853,640
4. Step 4: Simplify right side
   851,220x = 3,435,981,249,600
5. Step 5: Solve for x
   x = 3,435,981,249,600/851,220
6. Step 6: Final answer
   x = 4,036,537.26