Finding the Fourth Proportional to 13,321.37, 18,388.74 and 8,783.34

Step by Step Solution

1. Step 1: Write the proportion equation
   13,321.37 : 18,388.74 = 8,783.34 : x
2. Step 2: Convert to fraction form
   13,321.37/18,388.74 = 8,783.34/x
3. Step 3: Cross multiply
   13,321.37x = 18,388.74 × 8,783.34
4. Step 4: Simplify right side
   13,321.37x = 161,514,555.59
5. Step 5: Solve for x
   x = 161,514,555.59/13,321.37
6. Step 6: Final answer
   x = 12,124.47