Finding the Fourth Proportional to 3,710.42, 5,120.85 and 2,138.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,710.42 : 5,120.85 = 2,138.52 : x
2. Step 2: Convert to fraction form
   3,710.42/5,120.85 = 2,138.52/x
3. Step 3: Cross multiply
   3,710.42x = 5,120.85 × 2,138.52
4. Step 4: Simplify right side
   3,710.42x = 10,951,040.14
5. Step 5: Solve for x
   x = 10,951,040.14/3,710.42
6. Step 6: Final answer
   x = 2,951.43