Finding the Fourth Proportional to 2,155.25, 2,974.31 and 1,271.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.25 : 2,974.31 = 1,271.81 : x
2. Step 2: Convert to fraction form
   2,155.25/2,974.31 = 1,271.81/x
3. Step 3: Cross multiply
   2,155.25x = 2,974.31 × 1,271.81
4. Step 4: Simplify right side
   2,155.25x = 3,782,757.20
5. Step 5: Solve for x
   x = 3,782,757.20/2,155.25
6. Step 6: Final answer
   x = 1,755.14