Finding the Fourth Proportional to 3,653.45, 5,472.42 and 3,525.57

Step by Step Solution

1. Step 1: Write the proportion equation
   3,653.45 : 5,472.42 = 3,525.57 : x
2. Step 2: Convert to fraction form
   3,653.45/5,472.42 = 3,525.57/x
3. Step 3: Cross multiply
   3,653.45x = 5,472.42 × 3,525.57
4. Step 4: Simplify right side
   3,653.45x = 19,293,399.78
5. Step 5: Solve for x
   x = 19,293,399.78/3,653.45
6. Step 6: Final answer
   x = 5,280.87