Finding the Fourth Proportional to 19,641.48, 27,105.83 and 10,689.57

Step by Step Solution

1. Step 1: Write the proportion equation
   19,641.48 : 27,105.83 = 10,689.57 : x
2. Step 2: Convert to fraction form
   19,641.48/27,105.83 = 10,689.57/x
3. Step 3: Cross multiply
   19,641.48x = 27,105.83 × 10,689.57
4. Step 4: Simplify right side
   19,641.48x = 289,749,613.75
5. Step 5: Solve for x
   x = 289,749,613.75/19,641.48
6. Step 6: Final answer
   x = 14,751.92