Finding the Fourth Proportional to 11,258.87, 16,866.43 and 5,419.58

Step by Step Solution

1. Step 1: Write the proportion equation
   11,258.87 : 16,866.43 = 5,419.58 : x
2. Step 2: Convert to fraction form
   11,258.87/16,866.43 = 5,419.58/x
3. Step 3: Cross multiply
   11,258.87x = 16,866.43 × 5,419.58
4. Step 4: Simplify right side
   11,258.87x = 91,408,868.82
5. Step 5: Solve for x
   x = 91,408,868.82/11,258.87
6. Step 6: Final answer
   x = 8,118.84