Finding the Fourth Proportional to 13,185.33, 19,778.20 and 5,288.54

Step by Step Solution

1. Step 1: Write the proportion equation
   13,185.33 : 19,778.20 = 5,288.54 : x
2. Step 2: Convert to fraction form
   13,185.33/19,778.20 = 5,288.54/x
3. Step 3: Cross multiply
   13,185.33x = 19,778.20 × 5,288.54
4. Step 4: Simplify right side
   13,185.33x = 104,597,838.05
5. Step 5: Solve for x
   x = 104,597,838.05/13,185.33
6. Step 6: Final answer
   x = 7,932.89