Finding the Fourth Proportional to 3,522.20, 5,280.56 and 1,442.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,522.20 : 5,280.56 = 1,442.72 : x
2. Step 2: Convert to fraction form
   3,522.20/5,280.56 = 1,442.72/x
3. Step 3: Cross multiply
   3,522.20x = 5,280.56 × 1,442.72
4. Step 4: Simplify right side
   3,522.20x = 7,618,380.92
5. Step 5: Solve for x
   x = 7,618,380.92/3,522.20
6. Step 6: Final answer
   x = 2,162.96