Finding the Fourth Proportional to 3,892.28, 5,371.50 and 2,123.97

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.28 : 5,371.50 = 2,123.97 : x
2. Step 2: Convert to fraction form
   3,892.28/5,371.50 = 2,123.97/x
3. Step 3: Cross multiply
   3,892.28x = 5,371.50 × 2,123.97
4. Step 4: Simplify right side
   3,892.28x = 11,408,904.86
5. Step 5: Solve for x
   x = 11,408,904.86/3,892.28
6. Step 6: Final answer
   x = 2,931.17