Finding the Fourth Proportional to 3,520.58, 5,281.76 and 1,055.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,520.58 : 5,281.76 = 1,055.39 : x
2. Step 2: Convert to fraction form
   3,520.58/5,281.76 = 1,055.39/x
3. Step 3: Cross multiply
   3,520.58x = 5,281.76 × 1,055.39
4. Step 4: Simplify right side
   3,520.58x = 5,574,316.69
5. Step 5: Solve for x
   x = 5,574,316.69/3,520.58
6. Step 6: Final answer
   x = 1,583.35