Finding the Fourth Proportional to 3,964.38, 5,470.97 and 2,196.15

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.38 : 5,470.97 = 2,196.15 : x
2. Step 2: Convert to fraction form
   3,964.38/5,470.97 = 2,196.15/x
3. Step 3: Cross multiply
   3,964.38x = 5,470.97 × 2,196.15
4. Step 4: Simplify right side
   3,964.38x = 12,015,059.78
5. Step 5: Solve for x
   x = 12,015,059.78/3,964.38
6. Step 6: Final answer
   x = 3,030.75