Finding the Fourth Proportional to 3,958.16, 5,462.04 and 2,189.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,958.16 : 5,462.04 = 2,189.72 : x
2. Step 2: Convert to fraction form
   3,958.16/5,462.04 = 2,189.72/x
3. Step 3: Cross multiply
   3,958.16x = 5,462.04 × 2,189.72
4. Step 4: Simplify right side
   3,958.16x = 11,960,338.23
5. Step 5: Solve for x
   x = 11,960,338.23/3,958.16
6. Step 6: Final answer
   x = 3,021.69