Finding the Fourth Proportional to 11,657.26, 16,081.89 and 7,879.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,657.26 : 16,081.89 = 7,879.05 : x
2. Step 2: Convert to fraction form
   11,657.26/16,081.89 = 7,879.05/x
3. Step 3: Cross multiply
   11,657.26x = 16,081.89 × 7,879.05
4. Step 4: Simplify right side
   11,657.26x = 126,710,015.40
5. Step 5: Solve for x
   x = 126,710,015.40/11,657.26
6. Step 6: Final answer
   x = 10,869.62