Finding the Fourth Proportional to 11,258.79, 16,891.83 and 5,414.64

Step by Step Solution

1. Step 1: Write the proportion equation
   11,258.79 : 16,891.83 = 5,414.64 : x
2. Step 2: Convert to fraction form
   11,258.79/16,891.83 = 5,414.64/x
3. Step 3: Cross multiply
   11,258.79x = 16,891.83 × 5,414.64
4. Step 4: Simplify right side
   11,258.79x = 91,463,178.39
5. Step 5: Solve for x
   x = 91,463,178.39/11,258.79
6. Step 6: Final answer
   x = 8,123.71