Finding the Fourth Proportional to 3,964.17, 5,470.56 and 2,195.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.17 : 5,470.56 = 2,195.76 : x
2. Step 2: Convert to fraction form
   3,964.17/5,470.56 = 2,195.76/x
3. Step 3: Cross multiply
   3,964.17x = 5,470.56 × 2,195.76
4. Step 4: Simplify right side
   3,964.17x = 12,012,036.83
5. Step 5: Solve for x
   x = 12,012,036.83/3,964.17
6. Step 6: Final answer
   x = 3,030.15