Finding the Fourth Proportional to 3,892.33, 5,371.37 and 2,123.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.33 : 5,371.37 = 2,123.91 : x
2. Step 2: Convert to fraction form
   3,892.33/5,371.37 = 2,123.91/x
3. Step 3: Cross multiply
   3,892.33x = 5,371.37 × 2,123.91
4. Step 4: Simplify right side
   3,892.33x = 11,408,268.98
5. Step 5: Solve for x
   x = 11,408,268.98/3,892.33
6. Step 6: Final answer
   x = 2,930.96