Finding the Fourth Proportional to 3,930.50, 5,424.42 and 2,162.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,930.50 : 5,424.42 = 2,162.48 : x
2. Step 2: Convert to fraction form
   3,930.50/5,424.42 = 2,162.48/x
3. Step 3: Cross multiply
   3,930.50x = 5,424.42 × 2,162.48
4. Step 4: Simplify right side
   3,930.50x = 11,730,172.64
5. Step 5: Solve for x
   x = 11,730,172.64/3,930.50
6. Step 6: Final answer
   x = 2,984.40