Finding the Fourth Proportional to 2,142.41, 2,956.49 and 1,172.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.41 : 2,956.49 = 1,172.27 : x
2. Step 2: Convert to fraction form
   2,142.41/2,956.49 = 1,172.27/x
3. Step 3: Cross multiply
   2,142.41x = 2,956.49 × 1,172.27
4. Step 4: Simplify right side
   2,142.41x = 3,465,797.52
5. Step 5: Solve for x
   x = 3,465,797.52/2,142.41
6. Step 6: Final answer
   x = 1,617.71