Finding the Fourth Proportional to 11,172.91, 15,414.21 and 7,196.33

Step by Step Solution

1. Step 1: Write the proportion equation
   11,172.91 : 15,414.21 = 7,196.33 : x
2. Step 2: Convert to fraction form
   11,172.91/15,414.21 = 7,196.33/x
3. Step 3: Cross multiply
   11,172.91x = 15,414.21 × 7,196.33
4. Step 4: Simplify right side
   11,172.91x = 110,925,768.83
5. Step 5: Solve for x
   x = 110,925,768.83/11,172.91
6. Step 6: Final answer
   x = 9,928.10