Finding the Fourth Proportional to 11,104.72, 16,671.72 and 10,187.80

Step by Step Solution

1. Step 1: Write the proportion equation
   11,104.72 : 16,671.72 = 10,187.80 : x
2. Step 2: Convert to fraction form
   11,104.72/16,671.72 = 10,187.80/x
3. Step 3: Cross multiply
   11,104.72x = 16,671.72 × 10,187.80
4. Step 4: Simplify right side
   11,104.72x = 169,848,149.02
5. Step 5: Solve for x
   x = 169,848,149.02/11,104.72
6. Step 6: Final answer
   x = 15,295.13