Finding the Fourth Proportional to 3,542.08, 5,309.72 and 2,003.20

Step by Step Solution

1. Step 1: Write the proportion equation
   3,542.08 : 5,309.72 = 2,003.20 : x
2. Step 2: Convert to fraction form
   3,542.08/5,309.72 = 2,003.20/x
3. Step 3: Cross multiply
   3,542.08x = 5,309.72 × 2,003.20
4. Step 4: Simplify right side
   3,542.08x = 10,636,431.10
5. Step 5: Solve for x
   x = 10,636,431.10/3,542.08
6. Step 6: Final answer
   x = 3,002.88