Finding the Fourth Proportional to 3,949.80, 5,450.72 and 2,181.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,949.80 : 5,450.72 = 2,181.53 : x
2. Step 2: Convert to fraction form
   3,949.80/5,450.72 = 2,181.53/x
3. Step 3: Cross multiply
   3,949.80x = 5,450.72 × 2,181.53
4. Step 4: Simplify right side
   3,949.80x = 11,890,871.04
5. Step 5: Solve for x
   x = 11,890,871.04/3,949.80
6. Step 6: Final answer
   x = 3,010.50