Finding the Fourth Proportional to 21,019.94, 29,008.59 and 11,588.48

Step by Step Solution

1. Step 1: Write the proportion equation
   21,019.94 : 29,008.59 = 11,588.48 : x
2. Step 2: Convert to fraction form
   21,019.94/29,008.59 = 11,588.48/x
3. Step 3: Cross multiply
   21,019.94x = 29,008.59 × 11,588.48
4. Step 4: Simplify right side
   21,019.94x = 336,165,465.04
5. Step 5: Solve for x
   x = 336,165,465.04/21,019.94
6. Step 6: Final answer
   x = 15,992.69