Finding the Fourth Proportional to 2,141.38, 2,956.44 and 1,643.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,141.38 : 2,956.44 = 1,643.05 : x
2. Step 2: Convert to fraction form
   2,141.38/2,956.44 = 1,643.05/x
3. Step 3: Cross multiply
   2,141.38x = 2,956.44 × 1,643.05
4. Step 4: Simplify right side
   2,141.38x = 4,857,578.74
5. Step 5: Solve for x
   x = 4,857,578.74/2,141.38
6. Step 6: Final answer
   x = 2,268.43