Finding the Fourth Proportional to 853,456.50, 1,280,814.48 and 404,176.50

Step by Step Solution

1. Step 1: Write the proportion equation
   853,456.50 : 1,280,814.48 = 404,176.50 : x
2. Step 2: Convert to fraction form
   853,456.50/1,280,814.48 = 404,176.50/x
3. Step 3: Cross multiply
   853,456.50x = 1,280,814.48 × 404,176.50
4. Step 4: Simplify right side
   853,456.50x = 517,675,113,675.72
5. Step 5: Solve for x
   x = 517,675,113,675.72/853,456.50
6. Step 6: Final answer
   x = 606,562.98