Finding the Fourth Proportional to 10,805, 16,195.98 and 5,603.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,805 : 16,195.98 = 5,603.72 : x
2. Step 2: Convert to fraction form
   10,805/16,195.98 = 5,603.72/x
3. Step 3: Cross multiply
   10,805x = 16,195.98 × 5,603.72
4. Step 4: Simplify right side
   10,805x = 90,757,737.05
5. Step 5: Solve for x
   x = 90,757,737.05/10,805
6. Step 6: Final answer
   x = 8,399.61