Finding the Fourth Proportional to 3,617.80, 5,433.98 and 3,515.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,617.80 : 5,433.98 = 3,515.72 : x
2. Step 2: Convert to fraction form
   3,617.80/5,433.98 = 3,515.72/x
3. Step 3: Cross multiply
   3,617.80x = 5,433.98 × 3,515.72
4. Step 4: Simplify right side
   3,617.80x = 19,104,352.17
5. Step 5: Solve for x
   x = 19,104,352.17/3,617.80
6. Step 6: Final answer
   x = 5,280.65