Finding the Fourth Proportional to 21,039.84, 29,036.52 and 12,089.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,039.84 : 29,036.52 = 12,089.52 : x
2. Step 2: Convert to fraction form
   21,039.84/29,036.52 = 12,089.52/x
3. Step 3: Cross multiply
   21,039.84x = 29,036.52 × 12,089.52
4. Step 4: Simplify right side
   21,039.84x = 351,037,589.27
5. Step 5: Solve for x
   x = 351,037,589.27/21,039.84
6. Step 6: Final answer
   x = 16,684.42