Finding the Fourth Proportional to 3,942.24, 5,440.32 and 2,370.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,942.24 : 5,440.32 = 2,370.72 : x
2. Step 2: Convert to fraction form
   3,942.24/5,440.32 = 2,370.72/x
3. Step 3: Cross multiply
   3,942.24x = 5,440.32 × 2,370.72
4. Step 4: Simplify right side
   3,942.24x = 12,897,475.43
5. Step 5: Solve for x
   x = 12,897,475.43/3,942.24
6. Step 6: Final answer
   x = 3,271.61