Finding the Fourth Proportional to 17,761.72, 24,512.78 and 10,687

Step by Step Solution

1. Step 1: Write the proportion equation
   17,761.72 : 24,512.78 = 10,687 : x
2. Step 2: Convert to fraction form
   17,761.72/24,512.78 = 10,687/x
3. Step 3: Cross multiply
   17,761.72x = 24,512.78 × 10,687
4. Step 4: Simplify right side
   17,761.72x = 261,968,079.86
5. Step 5: Solve for x
   x = 261,968,079.86/17,761.72
6. Step 6: Final answer
   x = 14,749.03