Finding the Fourth Proportional to 3,985.39, 5,499.77 and 2,216.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,985.39 : 5,499.77 = 2,216.96 : x
2. Step 2: Convert to fraction form
   3,985.39/5,499.77 = 2,216.96/x
3. Step 3: Cross multiply
   3,985.39x = 5,499.77 × 2,216.96
4. Step 4: Simplify right side
   3,985.39x = 12,192,770.10
5. Step 5: Solve for x
   x = 12,192,770.10/3,985.39
6. Step 6: Final answer
   x = 3,059.37