Finding the Fourth Proportional to 3,942.30, 5,906.45 and 3,513.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.30 : 5,906.45 = 3,513.27 : x
2. Step 2: Convert to fraction form
   3,942.30/5,906.45 = 3,513.27/x
3. Step 3: Cross multiply
   3,942.30x = 5,906.45 × 3,513.27
4. Step 4: Simplify right side
   3,942.30x = 20,750,984.52
5. Step 5: Solve for x
   x = 20,750,984.52/3,942.30
6. Step 6: Final answer
   x = 5,263.67