Finding the Fourth Proportional to 17,131.48, 23,640.54 and 9,679

Step by Step Solution

1. Step 1: Write the proportion equation
   17,131.48 : 23,640.54 = 9,679 : x
2. Step 2: Convert to fraction form
   17,131.48/23,640.54 = 9,679/x
3. Step 3: Cross multiply
   17,131.48x = 23,640.54 × 9,679
4. Step 4: Simplify right side
   17,131.48x = 228,816,786.66
5. Step 5: Solve for x
   x = 228,816,786.66/17,131.48
6. Step 6: Final answer
   x = 13,356.51