Finding the Fourth Proportional to 11,258.91, 15,538.61 and 9,367.15

Step by Step Solution

1. Step 1: Write the proportion equation
   11,258.91 : 15,538.61 = 9,367.15 : x
2. Step 2: Convert to fraction form
   11,258.91/15,538.61 = 9,367.15/x
3. Step 3: Cross multiply
   11,258.91x = 15,538.61 × 9,367.15
4. Step 4: Simplify right side
   11,258.91x = 145,552,443.83
5. Step 5: Solve for x
   x = 145,552,443.83/11,258.91
6. Step 6: Final answer
   x = 12,927.76