Finding the Fourth Proportional to 7,271.82, 10,912.37 and 3,111.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,271.82 : 10,912.37 = 3,111.89 : x
2. Step 2: Convert to fraction form
   7,271.82/10,912.37 = 3,111.89/x
3. Step 3: Cross multiply
   7,271.82x = 10,912.37 × 3,111.89
4. Step 4: Simplify right side
   7,271.82x = 33,958,024.96
5. Step 5: Solve for x
   x = 33,958,024.96/7,271.82
6. Step 6: Final answer
   x = 4,669.81