Finding the Fourth Proportional to 3,520.49, 5,280.83 and 1,055.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,520.49 : 5,280.83 = 1,055.25 : x
2. Step 2: Convert to fraction form
   3,520.49/5,280.83 = 1,055.25/x
3. Step 3: Cross multiply
   3,520.49x = 5,280.83 × 1,055.25
4. Step 4: Simplify right side
   3,520.49x = 5,572,590.58
5. Step 5: Solve for x
   x = 5,572,590.58/3,520.49
6. Step 6: Final answer
   x = 1,582.90