Finding the Fourth Proportional to 20,499.36, 30,749.31 and 5,707.92

Step by Step Solution

1. Step 1: Write the proportion equation
   20,499.36 : 30,749.31 = 5,707.92 : x
2. Step 2: Convert to fraction form
   20,499.36/30,749.31 = 5,707.92/x
3. Step 3: Cross multiply
   20,499.36x = 30,749.31 × 5,707.92
4. Step 4: Simplify right side
   20,499.36x = 175,514,601.54
5. Step 5: Solve for x
   x = 175,514,601.54/20,499.36
6. Step 6: Final answer
   x = 8,561.96