Finding the Fourth Proportional to 3,953.39, 5,443.61 and 3,453.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,953.39 : 5,443.61 = 3,453.12 : x
2. Step 2: Convert to fraction form
   3,953.39/5,443.61 = 3,453.12/x
3. Step 3: Cross multiply
   3,953.39x = 5,443.61 × 3,453.12
4. Step 4: Simplify right side
   3,953.39x = 18,797,421.30
5. Step 5: Solve for x
   x = 18,797,421.30/3,953.39
6. Step 6: Final answer
   x = 4,754.77