Finding the Fourth Proportional to 19,940.04, 27,517.86 and 12,285

Step by Step Solution

1. Step 1: Write the proportion equation
   19,940.04 : 27,517.86 = 12,285 : x
2. Step 2: Convert to fraction form
   19,940.04/27,517.86 = 12,285/x
3. Step 3: Cross multiply
   19,940.04x = 27,517.86 × 12,285
4. Step 4: Simplify right side
   19,940.04x = 338,056,910.10
5. Step 5: Solve for x
   x = 338,056,910.10/19,940.04
6. Step 6: Final answer
   x = 16,953.67