Finding the Fourth Proportional to 13,198.78, 18,213.72 and 7,896.52

Step by Step Solution

1. Step 1: Write the proportion equation
   13,198.78 : 18,213.72 = 7,896.52 : x
2. Step 2: Convert to fraction form
   13,198.78/18,213.72 = 7,896.52/x
3. Step 3: Cross multiply
   13,198.78x = 18,213.72 × 7,896.52
4. Step 4: Simplify right side
   13,198.78x = 143,825,004.25
5. Step 5: Solve for x
   x = 143,825,004.25/13,198.78
6. Step 6: Final answer
   x = 10,896.84