Finding the Fourth Proportional to 19,641.42, 27,105.30 and 10,689.03

Step by Step Solution

1. Step 1: Write the proportion equation
   19,641.42 : 27,105.30 = 10,689.03 : x
2. Step 2: Convert to fraction form
   19,641.42/27,105.30 = 10,689.03/x
3. Step 3: Cross multiply
   19,641.42x = 27,105.30 × 10,689.03
4. Step 4: Simplify right side
   19,641.42x = 289,729,364.86
5. Step 5: Solve for x
   x = 289,729,364.86/19,641.42
6. Step 6: Final answer
   x = 14,750.94