Finding the Fourth Proportional to 14,823.78, 20,456.59 and 8,109.24

Step by Step Solution

1. Step 1: Write the proportion equation
   14,823.78 : 20,456.59 = 8,109.24 : x
2. Step 2: Convert to fraction form
   14,823.78/20,456.59 = 8,109.24/x
3. Step 3: Cross multiply
   14,823.78x = 20,456.59 × 8,109.24
4. Step 4: Simplify right side
   14,823.78x = 165,887,397.89
5. Step 5: Solve for x
   x = 165,887,397.89/14,823.78
6. Step 6: Final answer
   x = 11,190.63