Finding the Fourth Proportional to 3,216.56, 4,821.30 and 2,104.64

Step by Step Solution

1. Step 1: Write the proportion equation
   3,216.56 : 4,821.30 = 2,104.64 : x
2. Step 2: Convert to fraction form
   3,216.56/4,821.30 = 2,104.64/x
3. Step 3: Cross multiply
   3,216.56x = 4,821.30 × 2,104.64
4. Step 4: Simplify right side
   3,216.56x = 10,147,100.83
5. Step 5: Solve for x
   x = 10,147,100.83/3,216.56
6. Step 6: Final answer
   x = 3,154.64