Finding the Fourth Proportional to 3,674.88, 5,517.18 and 3,518.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,674.88 : 5,517.18 = 3,518.55 : x
2. Step 2: Convert to fraction form
   3,674.88/5,517.18 = 3,518.55/x
3. Step 3: Cross multiply
   3,674.88x = 5,517.18 × 3,518.55
4. Step 4: Simplify right side
   3,674.88x = 19,412,473.69
5. Step 5: Solve for x
   x = 19,412,473.69/3,674.88
6. Step 6: Final answer
   x = 5,282.48