Finding the Fourth Proportional to 3,892.17, 5,371.25 and 2,123.82

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.17 : 5,371.25 = 2,123.82 : x
2. Step 2: Convert to fraction form
   3,892.17/5,371.25 = 2,123.82/x
3. Step 3: Cross multiply
   3,892.17x = 5,371.25 × 2,123.82
4. Step 4: Simplify right side
   3,892.17x = 11,407,568.18
5. Step 5: Solve for x
   x = 11,407,568.18/3,892.17
6. Step 6: Final answer
   x = 2,930.90