Finding the Fourth Proportional to 7,216.12, 9,958.53 and 4,231.54

Step by Step Solution

1. Step 1: Write the proportion equation
   7,216.12 : 9,958.53 = 4,231.54 : x
2. Step 2: Convert to fraction form
   7,216.12/9,958.53 = 4,231.54/x
3. Step 3: Cross multiply
   7,216.12x = 9,958.53 × 4,231.54
4. Step 4: Simplify right side
   7,216.12x = 42,139,918.04
5. Step 5: Solve for x
   x = 42,139,918.04/7,216.12
6. Step 6: Final answer
   x = 5,839.69