Finding the Fourth Proportional to 2,156.22, 2,975.49 and 1,271.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,156.22 : 2,975.49 = 1,271.55 : x
2. Step 2: Convert to fraction form
   2,156.22/2,975.49 = 1,271.55/x
3. Step 3: Cross multiply
   2,156.22x = 2,975.49 × 1,271.55
4. Step 4: Simplify right side
   2,156.22x = 3,783,484.31
5. Step 5: Solve for x
   x = 3,783,484.31/2,156.22
6. Step 6: Final answer
   x = 1,754.68