Finding the Fourth Proportional to 11,200.05, 16,789.07 and 5,355.30

Step by Step Solution

1. Step 1: Write the proportion equation
   11,200.05 : 16,789.07 = 5,355.30 : x
2. Step 2: Convert to fraction form
   11,200.05/16,789.07 = 5,355.30/x
3. Step 3: Cross multiply
   11,200.05x = 16,789.07 × 5,355.30
4. Step 4: Simplify right side
   11,200.05x = 89,910,395.85
5. Step 5: Solve for x
   x = 89,910,395.85/11,200.05
6. Step 6: Final answer
   x = 8,027.68