Finding the Fourth Proportional to 3,891.59, 5,370.37 and 2,123.27

Step by Step Solution

1. Step 1: Write the proportion equation
   3,891.59 : 5,370.37 = 2,123.27 : x
2. Step 2: Convert to fraction form
   3,891.59/5,370.37 = 2,123.27/x
3. Step 3: Cross multiply
   3,891.59x = 5,370.37 × 2,123.27
4. Step 4: Simplify right side
   3,891.59x = 11,402,713.35
5. Step 5: Solve for x
   x = 11,402,713.35/3,891.59
6. Step 6: Final answer
   x = 2,930.09