Finding the Fourth Proportional to 11,196.73, 15,438.66 and 7,158.16

Step by Step Solution

1. Step 1: Write the proportion equation
   11,196.73 : 15,438.66 = 7,158.16 : x
2. Step 2: Convert to fraction form
   11,196.73/15,438.66 = 7,158.16/x
3. Step 3: Cross multiply
   11,196.73x = 15,438.66 × 7,158.16
4. Step 4: Simplify right side
   11,196.73x = 110,512,321.27
5. Step 5: Solve for x
   x = 110,512,321.27/11,196.73
6. Step 6: Final answer
   x = 9,870.06