Finding the Fourth Proportional to 3,942.73, 5,424.73 and 3,845.53

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.73 : 5,424.73 = 3,845.53 : x
2. Step 2: Convert to fraction form
   3,942.73/5,424.73 = 3,845.53/x
3. Step 3: Cross multiply
   3,942.73x = 5,424.73 × 3,845.53
4. Step 4: Simplify right side
   3,942.73x = 20,860,961.96
5. Step 5: Solve for x
   x = 20,860,961.96/3,942.73
6. Step 6: Final answer
   x = 5,290.99