Finding the Fourth Proportional to 16,298.96, 22,488.89 and 9,928.85

Step by Step Solution

1. Step 1: Write the proportion equation
   16,298.96 : 22,488.89 = 9,928.85 : x
2. Step 2: Convert to fraction form
   16,298.96/22,488.89 = 9,928.85/x
3. Step 3: Cross multiply
   16,298.96x = 22,488.89 × 9,928.85
4. Step 4: Simplify right side
   16,298.96x = 223,288,653.39
5. Step 5: Solve for x
   x = 223,288,653.39/16,298.96
6. Step 6: Final answer
   x = 13,699.57