Finding the Fourth Proportional to 3,221.56, 4,830.18 and 2,181.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,221.56 : 4,830.18 = 2,181.52 : x
2. Step 2: Convert to fraction form
   3,221.56/4,830.18 = 2,181.52/x
3. Step 3: Cross multiply
   3,221.56x = 4,830.18 × 2,181.52
4. Step 4: Simplify right side
   3,221.56x = 10,537,134.27
5. Step 5: Solve for x
   x = 10,537,134.27/3,221.56
6. Step 6: Final answer
   x = 3,270.82