Finding the Fourth Proportional to 853,426.96, 1,280,770.40 and 404,147.10

Step by Step Solution

1. Step 1: Write the proportion equation
   853,426.96 : 1,280,770.40 = 404,147.10 : x
2. Step 2: Convert to fraction form
   853,426.96/1,280,770.40 = 404,147.10/x
3. Step 3: Cross multiply
   853,426.96x = 1,280,770.40 × 404,147.10
4. Step 4: Simplify right side
   853,426.96x = 517,619,648,739.10
5. Step 5: Solve for x
   x = 517,619,648,739.10/853,426.96
6. Step 6: Final answer
   x = 606,518.98