Finding the Fourth Proportional to 7,072.34, 9,759.56 and 3,928.73

Step by Step Solution

1. Step 1: Write the proportion equation
   7,072.34 : 9,759.56 = 3,928.73 : x
2. Step 2: Convert to fraction form
   7,072.34/9,759.56 = 3,928.73/x
3. Step 3: Cross multiply
   7,072.34x = 9,759.56 × 3,928.73
4. Step 4: Simplify right side
   7,072.34x = 38,342,607.72
5. Step 5: Solve for x
   x = 38,342,607.72/7,072.34
6. Step 6: Final answer
   x = 5,421.49