Finding the Fourth Proportional to 13,196.36, 18,205.91 and 7,531.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.36 : 18,205.91 = 7,531.42 : x
2. Step 2: Convert to fraction form
   13,196.36/18,205.91 = 7,531.42/x
3. Step 3: Cross multiply
   13,196.36x = 18,205.91 × 7,531.42
4. Step 4: Simplify right side
   13,196.36x = 137,116,312.72
5. Step 5: Solve for x
   x = 137,116,312.72/13,196.36
6. Step 6: Final answer
   x = 10,390.47