Finding the Fourth Proportional to 11,878.25, 16,391.77 and 7,399.76

Step by Step Solution

1. Step 1: Write the proportion equation
   11,878.25 : 16,391.77 = 7,399.76 : x
2. Step 2: Convert to fraction form
   11,878.25/16,391.77 = 7,399.76/x
3. Step 3: Cross multiply
   11,878.25x = 16,391.77 × 7,399.76
4. Step 4: Simplify right side
   11,878.25x = 121,295,063.52
5. Step 5: Solve for x
   x = 121,295,063.52/11,878.25
6. Step 6: Final answer
   x = 10,211.53