Finding the Fourth Proportional to 3,958.45, 5,462.72 and 2,190.05

Step by Step Solution

1. Step 1: Write the proportion equation
   3,958.45 : 5,462.72 = 2,190.05 : x
2. Step 2: Convert to fraction form
   3,958.45/5,462.72 = 2,190.05/x
3. Step 3: Cross multiply
   3,958.45x = 5,462.72 × 2,190.05
4. Step 4: Simplify right side
   3,958.45x = 11,963,663.42
5. Step 5: Solve for x
   x = 11,963,663.42/3,958.45
6. Step 6: Final answer
   x = 3,022.31