Finding the Fourth Proportional to 8,111.89, 12,168.96 and 2,845.68

Step by Step Solution

1. Step 1: Write the proportion equation
   8,111.89 : 12,168.96 = 2,845.68 : x
2. Step 2: Convert to fraction form
   8,111.89/12,168.96 = 2,845.68/x
3. Step 3: Cross multiply
   8,111.89x = 12,168.96 × 2,845.68
4. Step 4: Simplify right side
   8,111.89x = 34,628,966.09
5. Step 5: Solve for x
   x = 34,628,966.09/8,111.89
6. Step 6: Final answer
   x = 4,268.91