Finding the Fourth Proportional to 3,892.02, 5,370.89 and 2,123.66

Step by Step Solution

1. Step 1: Write the proportion equation
   3,892.02 : 5,370.89 = 2,123.66 : x
2. Step 2: Convert to fraction form
   3,892.02/5,370.89 = 2,123.66/x
3. Step 3: Cross multiply
   3,892.02x = 5,370.89 × 2,123.66
4. Step 4: Simplify right side
   3,892.02x = 11,405,906.78
5. Step 5: Solve for x
   x = 11,405,906.78/3,892.02
6. Step 6: Final answer
   x = 2,930.59