Finding the Fourth Proportional to 3,970.42, 5,470.28 and 3,329.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,970.42 : 5,470.28 = 3,329.72 : x
2. Step 2: Convert to fraction form
   3,970.42/5,470.28 = 3,329.72/x
3. Step 3: Cross multiply
   3,970.42x = 5,470.28 × 3,329.72
4. Step 4: Simplify right side
   3,970.42x = 18,214,500.72
5. Step 5: Solve for x
   x = 18,214,500.72/3,970.42
6. Step 6: Final answer
   x = 4,587.55