Finding the Fourth Proportional to 2,155.38, 2,974.49 and 1,271.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.38 : 2,974.49 = 1,271.94 : x
2. Step 2: Convert to fraction form
   2,155.38/2,974.49 = 1,271.94/x
3. Step 3: Cross multiply
   2,155.38x = 2,974.49 × 1,271.94
4. Step 4: Simplify right side
   2,155.38x = 3,783,372.81
5. Step 5: Solve for x
   x = 3,783,372.81/2,155.38
6. Step 6: Final answer
   x = 1,755.32