Finding the Fourth Proportional to 3,892.04, 5,371.02 and 2,123.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.04 : 5,371.02 = 2,123.78 : x
2. Step 2: Convert to fraction form
   3,892.04/5,371.02 = 2,123.78/x
3. Step 3: Cross multiply
   3,892.04x = 5,371.02 × 2,123.78
4. Step 4: Simplify right side
   3,892.04x = 11,406,864.86
5. Step 5: Solve for x
   x = 11,406,864.86/3,892.04
6. Step 6: Final answer
   x = 2,930.82