Finding the Fourth Proportional to 13,233.86, 19,825.39 and 8,221.37

Step by Step Solution

1. Step 1: Write the proportion equation
   13,233.86 : 19,825.39 = 8,221.37 : x
2. Step 2: Convert to fraction form
   13,233.86/19,825.39 = 8,221.37/x
3. Step 3: Cross multiply
   13,233.86x = 19,825.39 × 8,221.37
4. Step 4: Simplify right side
   13,233.86x = 162,991,825.48
5. Step 5: Solve for x
   x = 162,991,825.48/13,233.86
6. Step 6: Final answer
   x = 12,316.28