Finding the Fourth Proportional to 3,521.72, 5,280.62 and 1,443.18

Step by Step Solution

1. Step 1: Write the proportion equation
   3,521.72 : 5,280.62 = 1,443.18 : x
2. Step 2: Convert to fraction form
   3,521.72/5,280.62 = 1,443.18/x
3. Step 3: Cross multiply
   3,521.72x = 5,280.62 × 1,443.18
4. Step 4: Simplify right side
   3,521.72x = 7,620,885.17
5. Step 5: Solve for x
   x = 7,620,885.17/3,521.72
6. Step 6: Final answer
   x = 2,163.97