Finding the Fourth Proportional to 19,783.72, 27,303.78 and 12,229.48

Step by Step Solution

1. Step 1: Write the proportion equation
   19,783.72 : 27,303.78 = 12,229.48 : x
2. Step 2: Convert to fraction form
   19,783.72/27,303.78 = 12,229.48/x
3. Step 3: Cross multiply
   19,783.72x = 27,303.78 × 12,229.48
4. Step 4: Simplify right side
   19,783.72x = 333,911,031.43
5. Step 5: Solve for x
   x = 333,911,031.43/19,783.72
6. Step 6: Final answer
   x = 16,878.07