Finding the Fourth Proportional to 2,155.32, 2,974.23 and 1,271.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.32 : 2,974.23 = 1,271.61 : x
2. Step 2: Convert to fraction form
   2,155.32/2,974.23 = 1,271.61/x
3. Step 3: Cross multiply
   2,155.32x = 2,974.23 × 1,271.61
4. Step 4: Simplify right side
   2,155.32x = 3,782,060.61
5. Step 5: Solve for x
   x = 3,782,060.61/2,155.32
6. Step 6: Final answer
   x = 1,754.76