Finding the Fourth Proportional to 7,049.91, 9,729.15 and 3,906.18

Step by Step Solution

1. Step 1: Write the proportion equation
   7,049.91 : 9,729.15 = 3,906.18 : x
2. Step 2: Convert to fraction form
   7,049.91/9,729.15 = 3,906.18/x
3. Step 3: Cross multiply
   7,049.91x = 9,729.15 × 3,906.18
4. Step 4: Simplify right side
   7,049.91x = 38,003,811.15
5. Step 5: Solve for x
   x = 38,003,811.15/7,049.91
6. Step 6: Final answer
   x = 5,390.68