Finding the Fourth Proportional to 3,971.80, 5,480.83 and 2,203.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,971.80 : 5,480.83 = 2,203.53 : x
2. Step 2: Convert to fraction form
   3,971.80/5,480.83 = 2,203.53/x
3. Step 3: Cross multiply
   3,971.80x = 5,480.83 × 2,203.53
4. Step 4: Simplify right side
   3,971.80x = 12,077,155.53
5. Step 5: Solve for x
   x = 12,077,155.53/3,971.80
6. Step 6: Final answer
   x = 3,040.73