Finding the Fourth Proportional to 3,788.56, 5,228.17 and 2,216.67

Step by Step Solution

1. Step 1: Write the proportion equation
   3,788.56 : 5,228.17 = 2,216.67 : x
2. Step 2: Convert to fraction form
   3,788.56/5,228.17 = 2,216.67/x
3. Step 3: Cross multiply
   3,788.56x = 5,228.17 × 2,216.67
4. Step 4: Simplify right side
   3,788.56x = 11,589,127.59
5. Step 5: Solve for x
   x = 11,589,127.59/3,788.56
6. Step 6: Final answer
   x = 3,058.98