Finding the Fourth Proportional to 2,253.12, 3,354.56 and 2,220.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,253.12 : 3,354.56 = 2,220.72 : x
2. Step 2: Convert to fraction form
   2,253.12/3,354.56 = 2,220.72/x
3. Step 3: Cross multiply
   2,253.12x = 3,354.56 × 2,220.72
4. Step 4: Simplify right side
   2,253.12x = 7,449,538.48
5. Step 5: Solve for x
   x = 7,449,538.48/2,253.12
6. Step 6: Final answer
   x = 3,306.32