Finding the Fourth Proportional to 3,129.20, 4,689.86 and 2,738.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,129.20 : 4,689.86 = 2,738.27 : x
2. Step 2: Convert to fraction form
   3,129.20/4,689.86 = 2,738.27/x
3. Step 3: Cross multiply
   3,129.20x = 4,689.86 × 2,738.27
4. Step 4: Simplify right side
   3,129.20x = 12,842,086.34
5. Step 5: Solve for x
   x = 12,842,086.34/3,129.20
6. Step 6: Final answer
   x = 4,103.96