Finding the Fourth Proportional to 3,520.22, 5,280.13 and 1,055.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,520.22 : 5,280.13 = 1,055.10 : x
2. Step 2: Convert to fraction form
   3,520.22/5,280.13 = 1,055.10/x
3. Step 3: Cross multiply
   3,520.22x = 5,280.13 × 1,055.10
4. Step 4: Simplify right side
   3,520.22x = 5,571,059.89
5. Step 5: Solve for x
   x = 5,571,059.89/3,520.22
6. Step 6: Final answer
   x = 1,582.59