Finding the Fourth Proportional to 3,984.91, 5,499.23 and 2,216.51

Step by Step Solution

1. Step 1: Write the proportion equation
   3,984.91 : 5,499.23 = 2,216.51 : x
2. Step 2: Convert to fraction form
   3,984.91/5,499.23 = 2,216.51/x
3. Step 3: Cross multiply
   3,984.91x = 5,499.23 × 2,216.51
4. Step 4: Simplify right side
   3,984.91x = 12,189,080.33
5. Step 5: Solve for x
   x = 12,189,080.33/3,984.91
6. Step 6: Final answer
   x = 3,058.81