Finding the Fourth Proportional to 11,019.72, 16,515.54 and 5,163.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,019.72 : 16,515.54 = 5,163.42 : x
2. Step 2: Convert to fraction form
   11,019.72/16,515.54 = 5,163.42/x
3. Step 3: Cross multiply
   11,019.72x = 16,515.54 × 5,163.42
4. Step 4: Simplify right side
   11,019.72x = 85,276,669.55
5. Step 5: Solve for x
   x = 85,276,669.55/11,019.72
6. Step 6: Final answer
   x = 7,738.55