Finding the Fourth Proportional to 9,327.40, 12,879.61 and 7,086.41

Step by Step Solution

1. Step 1: Write the proportion equation
   9,327.40 : 12,879.61 = 7,086.41 : x
2. Step 2: Convert to fraction form
   9,327.40/12,879.61 = 7,086.41/x
3. Step 3: Cross multiply
   9,327.40x = 12,879.61 × 7,086.41
4. Step 4: Simplify right side
   9,327.40x = 91,270,199.51
5. Step 5: Solve for x
   x = 91,270,199.51/9,327.40
6. Step 6: Final answer
   x = 9,785.17