Finding the Fourth Proportional to 17,218.58, 23,769.52 and 13,238.30

Step by Step Solution

1. Step 1: Write the proportion equation
   17,218.58 : 23,769.52 = 13,238.30 : x
2. Step 2: Convert to fraction form
   17,218.58/23,769.52 = 13,238.30/x
3. Step 3: Cross multiply
   17,218.58x = 23,769.52 × 13,238.30
4. Step 4: Simplify right side
   17,218.58x = 314,668,036.62
5. Step 5: Solve for x
   x = 314,668,036.62/17,218.58
6. Step 6: Final answer
   x = 18,274.91