Finding the Fourth Proportional to 11,271.57, 15,540.59 and 7,231.25

Step by Step Solution

1. Step 1: Write the proportion equation
   11,271.57 : 15,540.59 = 7,231.25 : x
2. Step 2: Convert to fraction form
   11,271.57/15,540.59 = 7,231.25/x
3. Step 3: Cross multiply
   11,271.57x = 15,540.59 × 7,231.25
4. Step 4: Simplify right side
   11,271.57x = 112,377,777.58
5. Step 5: Solve for x
   x = 112,377,777.58/11,271.57
6. Step 6: Final answer
   x = 9,970.02