Finding the Fourth Proportional to 9,067.39, 12,511.79 and 5,290.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,067.39 : 12,511.79 = 5,290.09 : x
2. Step 2: Convert to fraction form
   9,067.39/12,511.79 = 5,290.09/x
3. Step 3: Cross multiply
   9,067.39x = 12,511.79 × 5,290.09
4. Step 4: Simplify right side
   9,067.39x = 66,188,495.16
5. Step 5: Solve for x
   x = 66,188,495.16/9,067.39
6. Step 6: Final answer
   x = 7,299.62