Finding the Fourth Proportional to 17,760.72, 24,511.40 and 10,686

Step by Step Solution

1. Step 1: Write the proportion equation
   17,760.72 : 24,511.40 = 10,686 : x
2. Step 2: Convert to fraction form
   17,760.72/24,511.40 = 10,686/x
3. Step 3: Cross multiply
   17,760.72x = 24,511.40 × 10,686
4. Step 4: Simplify right side
   17,760.72x = 261,928,820.40
5. Step 5: Solve for x
   x = 261,928,820.40/17,760.72
6. Step 6: Final answer
   x = 14,747.65