Finding the Fourth Proportional to 2,338.82, 3,508.61 and 878.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,338.82 : 3,508.61 = 878.09 : x
2. Step 2: Convert to fraction form
   2,338.82/3,508.61 = 878.09/x
3. Step 3: Cross multiply
   2,338.82x = 3,508.61 × 878.09
4. Step 4: Simplify right side
   2,338.82x = 3,080,853.42
5. Step 5: Solve for x
   x = 3,080,853.42/2,338.82
6. Step 6: Final answer
   x = 1,317.27