Finding the Fourth Proportional to 15,105.69, 20,844.27 and 8,389.80

Step by Step Solution

1. Step 1: Write the proportion equation
   15,105.69 : 20,844.27 = 8,389.80 : x
2. Step 2: Convert to fraction form
   15,105.69/20,844.27 = 8,389.80/x
3. Step 3: Cross multiply
   15,105.69x = 20,844.27 × 8,389.80
4. Step 4: Simplify right side
   15,105.69x = 174,879,256.45
5. Step 5: Solve for x
   x = 174,879,256.45/15,105.69
6. Step 6: Final answer
   x = 11,577.05