Finding the Fourth Proportional to 7,049.58, 9,728.55 and 3,905.94

Step by Step Solution

1. Step 1: Write the proportion equation
   7,049.58 : 9,728.55 = 3,905.94 : x
2. Step 2: Convert to fraction form
   7,049.58/9,728.55 = 3,905.94/x
3. Step 3: Cross multiply
   7,049.58x = 9,728.55 × 3,905.94
4. Step 4: Simplify right side
   7,049.58x = 37,999,132.59
5. Step 5: Solve for x
   x = 37,999,132.59/7,049.58
6. Step 6: Final answer
   x = 5,390.27