Finding the Fourth Proportional to 21,016.52, 29,002.88 and 11,584.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,016.52 : 29,002.88 = 11,584.88 : x
2. Step 2: Convert to fraction form
   21,016.52/29,002.88 = 11,584.88/x
3. Step 3: Cross multiply
   21,016.52x = 29,002.88 × 11,584.88
4. Step 4: Simplify right side
   21,016.52x = 335,994,884.45
5. Step 5: Solve for x
   x = 335,994,884.45/21,016.52
6. Step 6: Final answer
   x = 15,987.18