Finding the Fourth Proportional to 2,138.82, 2,951.46 and 1,255.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,138.82 : 2,951.46 = 1,255.11 : x
2. Step 2: Convert to fraction form
   2,138.82/2,951.46 = 1,255.11/x
3. Step 3: Cross multiply
   2,138.82x = 2,951.46 × 1,255.11
4. Step 4: Simplify right side
   2,138.82x = 3,704,406.96
5. Step 5: Solve for x
   x = 3,704,406.96/2,138.82
6. Step 6: Final answer
   x = 1,731.99