Finding the Fourth Proportional to 2,141.46, 2,956.89 and 1,643.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.46 : 2,956.89 = 1,643.31 : x
2. Step 2: Convert to fraction form
   2,141.46/2,956.89 = 1,643.31/x
3. Step 3: Cross multiply
   2,141.46x = 2,956.89 × 1,643.31
4. Step 4: Simplify right side
   2,141.46x = 4,859,086.91
5. Step 5: Solve for x
   x = 4,859,086.91/2,141.46
6. Step 6: Final answer
   x = 2,269.05