Finding the Fourth Proportional to 19,643.67, 27,105.30 and 12,091.23

Step by Step Solution

1. Step 1: Write the proportion equation
   19,643.67 : 27,105.30 = 12,091.23 : x
2. Step 2: Convert to fraction form
   19,643.67/27,105.30 = 12,091.23/x
3. Step 3: Cross multiply
   19,643.67x = 27,105.30 × 12,091.23
4. Step 4: Simplify right side
   19,643.67x = 327,736,416.52
5. Step 5: Solve for x
   x = 327,736,416.52/19,643.67
6. Step 6: Final answer
   x = 16,684.07