Finding the Fourth Proportional to 57,709.34, 86,559.69 and 20,269.74

Step by Step Solution

1. Step 1: Write the proportion equation
   57,709.34 : 86,559.69 = 20,269.74 : x
2. Step 2: Convert to fraction form
   57,709.34/86,559.69 = 20,269.74/x
3. Step 3: Cross multiply
   57,709.34x = 86,559.69 × 20,269.74
4. Step 4: Simplify right side
   57,709.34x = 1,754,542,697.37
5. Step 5: Solve for x
   x = 1,754,542,697.37/57,709.34
6. Step 6: Final answer
   x = 30,403.10