Finding the Fourth Proportional to 3,892.39, 5,371.27 and 2,123.64

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.39 : 5,371.27 = 2,123.64 : x
2. Step 2: Convert to fraction form
   3,892.39/5,371.27 = 2,123.64/x
3. Step 3: Cross multiply
   3,892.39x = 5,371.27 × 2,123.64
4. Step 4: Simplify right side
   3,892.39x = 11,406,638.51
5. Step 5: Solve for x
   x = 11,406,638.51/3,892.39
6. Step 6: Final answer
   x = 2,930.50