Finding the Fourth Proportional to 21,288.69, 29,375.73 and 12,336.03

Step by Step Solution

1. Step 1: Write the proportion equation
   21,288.69 : 29,375.73 = 12,336.03 : x
2. Step 2: Convert to fraction form
   21,288.69/29,375.73 = 12,336.03/x
3. Step 3: Cross multiply
   21,288.69x = 29,375.73 × 12,336.03
4. Step 4: Simplify right side
   21,288.69x = 362,379,886.55
5. Step 5: Solve for x
   x = 362,379,886.55/21,288.69
6. Step 6: Final answer
   x = 17,022.18