Finding the Fourth Proportional to 3,892.32, 5,371.40 and 2,123.88

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.32 : 5,371.40 = 2,123.88 : x
2. Step 2: Convert to fraction form
   3,892.32/5,371.40 = 2,123.88/x
3. Step 3: Cross multiply
   3,892.32x = 5,371.40 × 2,123.88
4. Step 4: Simplify right side
   3,892.32x = 11,408,209.03
5. Step 5: Solve for x
   x = 11,408,209.03/3,892.32
6. Step 6: Final answer
   x = 2,930.95