Finding the Fourth Proportional to 5,282.88, 7,934.58 and 3,890.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,282.88 : 7,934.58 = 3,890.72 : x
2. Step 2: Convert to fraction form
   5,282.88/7,934.58 = 3,890.72/x
3. Step 3: Cross multiply
   5,282.88x = 7,934.58 × 3,890.72
4. Step 4: Simplify right side
   5,282.88x = 30,871,229.10
5. Step 5: Solve for x
   x = 30,871,229.10/5,282.88
6. Step 6: Final answer
   x = 5,843.64