Finding the Fourth Proportional to 17,223.48, 23,769.18 and 13,491

Step by Step Solution

1. Step 1: Write the proportion equation
   17,223.48 : 23,769.18 = 13,491 : x
2. Step 2: Convert to fraction form
   17,223.48/23,769.18 = 13,491/x
3. Step 3: Cross multiply
   17,223.48x = 23,769.18 × 13,491
4. Step 4: Simplify right side
   17,223.48x = 320,670,007.38
5. Step 5: Solve for x
   x = 320,670,007.38/17,223.48
6. Step 6: Final answer
   x = 18,618.19