Finding the Fourth Proportional to 3,222.72, 4,827.68 and 2,123.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,222.72 : 4,827.68 = 2,123.75 : x
2. Step 2: Convert to fraction form
   3,222.72/4,827.68 = 2,123.75/x
3. Step 3: Cross multiply
   3,222.72x = 4,827.68 × 2,123.75
4. Step 4: Simplify right side
   3,222.72x = 10,252,786.85
5. Step 5: Solve for x
   x = 10,252,786.85/3,222.72
6. Step 6: Final answer
   x = 3,181.41