Finding the Fourth Proportional to 19,399.40, 29,113.59 and 13,144.58

Step by Step Solution

1. Step 1: Write the proportion equation
   19,399.40 : 29,113.59 = 13,144.58 : x
2. Step 2: Convert to fraction form
   19,399.40/29,113.59 = 13,144.58/x
3. Step 3: Cross multiply
   19,399.40x = 29,113.59 × 13,144.58
4. Step 4: Simplify right side
   19,399.40x = 382,685,701.55
5. Step 5: Solve for x
   x = 382,685,701.55/19,399.40
6. Step 6: Final answer
   x = 19,726.68