Finding the Fourth Proportional to 21,019.98, 29,007.55 and 11,588.55

Step by Step Solution

1. Step 1: Write the proportion equation
   21,019.98 : 29,007.55 = 11,588.55 : x
2. Step 2: Convert to fraction form
   21,019.98/29,007.55 = 11,588.55/x
3. Step 3: Cross multiply
   21,019.98x = 29,007.55 × 11,588.55
4. Step 4: Simplify right side
   21,019.98x = 336,155,443.55
5. Step 5: Solve for x
   x = 336,155,443.55/21,019.98
6. Step 6: Final answer
   x = 15,992.19