Finding the Fourth Proportional to 7,072.50, 9,760.06 and 3,928.98

Step by Step Solution

1. Step 1: Write the proportion equation
   7,072.50 : 9,760.06 = 3,928.98 : x
2. Step 2: Convert to fraction form
   7,072.50/9,760.06 = 3,928.98/x
3. Step 3: Cross multiply
   7,072.50x = 9,760.06 × 3,928.98
4. Step 4: Simplify right side
   7,072.50x = 38,347,080.54
5. Step 5: Solve for x
   x = 38,347,080.54/7,072.50
6. Step 6: Final answer
   x = 5,422.00