Finding the Fourth Proportional to 2,735.78, 4,100.42 and 1,271.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,735.78 : 4,100.42 = 1,271.90 : x
2. Step 2: Convert to fraction form
   2,735.78/4,100.42 = 1,271.90/x
3. Step 3: Cross multiply
   2,735.78x = 4,100.42 × 1,271.90
4. Step 4: Simplify right side
   2,735.78x = 5,215,337.63
5. Step 5: Solve for x
   x = 5,215,337.63/2,735.78
6. Step 6: Final answer
   x = 1,906.35