Finding the Fourth Proportional to 11,255.15, 16,878.58 and 3,857.63

Step by Step Solution

1. Step 1: Write the proportion equation
   11,255.15 : 16,878.58 = 3,857.63 : x
2. Step 2: Convert to fraction form
   11,255.15/16,878.58 = 3,857.63/x
3. Step 3: Cross multiply
   11,255.15x = 16,878.58 × 3,857.63
4. Step 4: Simplify right side
   11,255.15x = 65,111,222.53
5. Step 5: Solve for x
   x = 65,111,222.53/11,255.15
6. Step 6: Final answer
   x = 5,785.01