Finding the Fourth Proportional to 2,964.49, 4,086.42 and 2,217.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,964.49 : 4,086.42 = 2,217.31 : x
2. Step 2: Convert to fraction form
   2,964.49/4,086.42 = 2,217.31/x
3. Step 3: Cross multiply
   2,964.49x = 4,086.42 × 2,217.31
4. Step 4: Simplify right side
   2,964.49x = 9,060,859.93
5. Step 5: Solve for x
   x = 9,060,859.93/2,964.49
6. Step 6: Final answer
   x = 3,056.47