Finding the Fourth Proportional to 20,540.76, 30,805.86 and 8,061.24

Step by Step Solution

1. Step 1: Write the proportion equation
   20,540.76 : 30,805.86 = 8,061.24 : x
2. Step 2: Convert to fraction form
   20,540.76/30,805.86 = 8,061.24/x
3. Step 3: Cross multiply
   20,540.76x = 30,805.86 × 8,061.24
4. Step 4: Simplify right side
   20,540.76x = 248,333,430.87
5. Step 5: Solve for x
   x = 248,333,430.87/20,540.76
6. Step 6: Final answer
   x = 12,089.79