Finding the Fourth Proportional to 7,111.33, 10,668.11 and 5,791.91

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.33 : 10,668.11 = 5,791.91 : x
2. Step 2: Convert to fraction form
   7,111.33/10,668.11 = 5,791.91/x
3. Step 3: Cross multiply
   7,111.33x = 10,668.11 × 5,791.91
4. Step 4: Simplify right side
   7,111.33x = 61,788,650.69
5. Step 5: Solve for x
   x = 61,788,650.69/7,111.33
6. Step 6: Final answer
   x = 8,688.76