Finding the Fourth Proportional to 7,050.48, 9,729.72 and 3,906.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,050.48 : 9,729.72 = 3,906.72 : x
2. Step 2: Convert to fraction form
   7,050.48/9,729.72 = 3,906.72/x
3. Step 3: Cross multiply
   7,050.48x = 9,729.72 × 3,906.72
4. Step 4: Simplify right side
   7,050.48x = 38,011,291.72
5. Step 5: Solve for x
   x = 38,011,291.72/7,050.48
6. Step 6: Final answer
   x = 5,391.31