Finding the Fourth Proportional to 17,131.48, 23,642.22 and 13,399

Step by Step Solution

1. Step 1: Write the proportion equation
   17,131.48 : 23,642.22 = 13,399 : x
2. Step 2: Convert to fraction form
   17,131.48/23,642.22 = 13,399/x
3. Step 3: Cross multiply
   17,131.48x = 23,642.22 × 13,399
4. Step 4: Simplify right side
   17,131.48x = 316,782,105.78
5. Step 5: Solve for x
   x = 316,782,105.78/17,131.48
6. Step 6: Final answer
   x = 18,491.23