Finding the Fourth Proportional to 3,964.84, 5,470.86 and 2,286.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,964.84 : 5,470.86 = 2,286.31 : x
2. Step 2: Convert to fraction form
   3,964.84/5,470.86 = 2,286.31/x
3. Step 3: Cross multiply
   3,964.84x = 5,470.86 × 2,286.31
4. Step 4: Simplify right side
   3,964.84x = 12,508,081.93
5. Step 5: Solve for x
   x = 12,508,081.93/3,964.84
6. Step 6: Final answer
   x = 3,154.75