Finding the Fourth Proportional to 7,111.76, 10,668.24 and 2,431.58

Step by Step Solution

1. Step 1: Write the proportion equation
   7,111.76 : 10,668.24 = 2,431.58 : x
2. Step 2: Convert to fraction form
   7,111.76/10,668.24 = 2,431.58/x
3. Step 3: Cross multiply
   7,111.76x = 10,668.24 × 2,431.58
4. Step 4: Simplify right side
   7,111.76x = 25,940,679.02
5. Step 5: Solve for x
   x = 25,940,679.02/7,111.76
6. Step 6: Final answer
   x = 3,647.58