Finding the Third Proportional to 404,878 and 865,800

Step by Step Solution

1. Step 1: Write the proportion equation
   404,878 : 865,800 = 865,800 : x
2. Step 2: Convert to fraction form
   404,878/865,800 = 865,800/x
3. Step 3: Cross multiply
   404,878x = 865,800 × 865,800
4. Step 4: Simplify right side
   404,878x = 749,609,640,000
5. Step 5: Solve for x
   x = 749,609,640,000/404,878
6. Step 6: Final answer
   x = 1,851,445.72