Finding the Fourth Proportional to 21,131.24, 29,164.50 and 12,059.54

Step by Step Solution

1. Step 1: Write the proportion equation
   21,131.24 : 29,164.50 = 12,059.54 : x
2. Step 2: Convert to fraction form
   21,131.24/29,164.50 = 12,059.54/x
3. Step 3: Cross multiply
   21,131.24x = 29,164.50 × 12,059.54
4. Step 4: Simplify right side
   21,131.24x = 351,710,454.33
5. Step 5: Solve for x
   x = 351,710,454.33/21,131.24
6. Step 6: Final answer
   x = 16,644.10