Finding the Fourth Proportional to 9,789.27, 13,508.42 and 5,811.36

Step by Step Solution

1. Step 1: Write the proportion equation
   9,789.27 : 13,508.42 = 5,811.36 : x
2. Step 2: Convert to fraction form
   9,789.27/13,508.42 = 5,811.36/x
3. Step 3: Cross multiply
   9,789.27x = 13,508.42 × 5,811.36
4. Step 4: Simplify right side
   9,789.27x = 78,502,262.59
5. Step 5: Solve for x
   x = 78,502,262.59/9,789.27
6. Step 6: Final answer
   x = 8,019.22