Finding the Fourth Proportional to 3,892.34, 5,371.43 and 2,123.97

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.34 : 5,371.43 = 2,123.97 : x
2. Step 2: Convert to fraction form
   3,892.34/5,371.43 = 2,123.97/x
3. Step 3: Cross multiply
   3,892.34x = 5,371.43 × 2,123.97
4. Step 4: Simplify right side
   3,892.34x = 11,408,745.56
5. Step 5: Solve for x
   x = 11,408,745.56/3,892.34
6. Step 6: Final answer
   x = 2,931.08