Finding the Fourth Proportional to 2,271.55, 3,134.75 and 1,276.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,271.55 : 3,134.75 = 1,276.80 : x
2. Step 2: Convert to fraction form
   2,271.55/3,134.75 = 1,276.80/x
3. Step 3: Cross multiply
   2,271.55x = 3,134.75 × 1,276.80
4. Step 4: Simplify right side
   2,271.55x = 4,002,426.74
5. Step 5: Solve for x
   x = 4,002,426.74/2,271.55
6. Step 6: Final answer
   x = 1,761.98