Finding the Fourth Proportional to 16,399.59, 24,488.04 and 13,029.90

Step by Step Solution

1. Step 1: Write the proportion equation
   16,399.59 : 24,488.04 = 13,029.90 : x
2. Step 2: Convert to fraction form
   16,399.59/24,488.04 = 13,029.90/x
3. Step 3: Cross multiply
   16,399.59x = 24,488.04 × 13,029.90
4. Step 4: Simplify right side
   16,399.59x = 319,076,712.40
5. Step 5: Solve for x
   x = 319,076,712.40/16,399.59
6. Step 6: Final answer
   x = 19,456.38