Finding the Fourth Proportional to 7,049.63, 9,728.79 and 3,905.82

Step by Step Solution

1. Step 1: Write the proportion equation
   7,049.63 : 9,728.79 = 3,905.82 : x
2. Step 2: Convert to fraction form
   7,049.63/9,728.79 = 3,905.82/x
3. Step 3: Cross multiply
   7,049.63x = 9,728.79 × 3,905.82
4. Step 4: Simplify right side
   7,049.63x = 37,998,902.56
5. Step 5: Solve for x
   x = 37,998,902.56/7,049.63
6. Step 6: Final answer
   x = 5,390.20