Finding the Fourth Proportional to 11,271.15, 15,551.39 and 7,287.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,271.15 : 15,551.39 = 7,287.47 : x
2. Step 2: Convert to fraction form
   11,271.15/15,551.39 = 7,287.47/x
3. Step 3: Cross multiply
   11,271.15x = 15,551.39 × 7,287.47
4. Step 4: Simplify right side
   11,271.15x = 113,330,286.86
5. Step 5: Solve for x
   x = 113,330,286.86/11,271.15
6. Step 6: Final answer
   x = 10,054.90