Finding the Fourth Proportional to 20,375.91, 30,560.59 and 5,581.37

Step by Step Solution

1. Step 1: Write the proportion equation
   20,375.91 : 30,560.59 = 5,581.37 : x
2. Step 2: Convert to fraction form
   20,375.91/30,560.59 = 5,581.37/x
3. Step 3: Cross multiply
   20,375.91x = 30,560.59 × 5,581.37
4. Step 4: Simplify right side
   20,375.91x = 170,569,932.30
5. Step 5: Solve for x
   x = 170,569,932.30/20,375.91
6. Step 6: Final answer
   x = 8,371.16