Finding the Fourth Proportional to 21,502.89, 29,674.50 and 12,072.33

Step by Step Solution

1. Step 1: Write the proportion equation
   21,502.89 : 29,674.50 = 12,072.33 : x
2. Step 2: Convert to fraction form
   21,502.89/29,674.50 = 12,072.33/x
3. Step 3: Cross multiply
   21,502.89x = 29,674.50 × 12,072.33
4. Step 4: Simplify right side
   21,502.89x = 358,240,356.59
5. Step 5: Solve for x
   x = 358,240,356.59/21,502.89
6. Step 6: Final answer
   x = 16,660.10