Finding the Fourth Proportional to 10,404.96, 15,623.84 and 8,223.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,404.96 : 15,623.84 = 8,223.42 : x
2. Step 2: Convert to fraction form
   10,404.96/15,623.84 = 8,223.42/x
3. Step 3: Cross multiply
   10,404.96x = 15,623.84 × 8,223.42
4. Step 4: Simplify right side
   10,404.96x = 128,481,431.22
5. Step 5: Solve for x
   x = 128,481,431.22/10,404.96
6. Step 6: Final answer
   x = 12,348.10