Finding the Fourth Proportional to 13,196.44, 18,205.86 and 7,889.32

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.44 : 18,205.86 = 7,889.32 : x
2. Step 2: Convert to fraction form
   13,196.44/18,205.86 = 7,889.32/x
3. Step 3: Cross multiply
   13,196.44x = 18,205.86 × 7,889.32
4. Step 4: Simplify right side
   13,196.44x = 143,631,855.42
5. Step 5: Solve for x
   x = 143,631,855.42/13,196.44
6. Step 6: Final answer
   x = 10,884.14