Finding the Fourth Proportional to 3,520.29, 5,280.42 and 1,055.03

Step by Step Solution

1. Step 1: Write the proportion equation
   3,520.29 : 5,280.42 = 1,055.03 : x
2. Step 2: Convert to fraction form
   3,520.29/5,280.42 = 1,055.03/x
3. Step 3: Cross multiply
   3,520.29x = 5,280.42 × 1,055.03
4. Step 4: Simplify right side
   3,520.29x = 5,570,979.07
5. Step 5: Solve for x
   x = 5,570,979.07/3,520.29
6. Step 6: Final answer
   x = 1,582.53