Finding the Fourth Proportional to 2,271.78, 3,134.89 and 1,276.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,271.78 : 3,134.89 = 1,276.87 : x
2. Step 2: Convert to fraction form
   2,271.78/3,134.89 = 1,276.87/x
3. Step 3: Cross multiply
   2,271.78x = 3,134.89 × 1,276.87
4. Step 4: Simplify right side
   2,271.78x = 4,002,840.61
5. Step 5: Solve for x
   x = 4,002,840.61/2,271.78
6. Step 6: Final answer
   x = 1,761.98