Finding the Fourth Proportional to 21,723.33, 29,974.55 and 12,650.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,723.33 : 29,974.55 = 12,650.61 : x
2. Step 2: Convert to fraction form
   21,723.33/29,974.55 = 12,650.61/x
3. Step 3: Cross multiply
   21,723.33x = 29,974.55 × 12,650.61
4. Step 4: Simplify right side
   21,723.33x = 379,196,278.72
5. Step 5: Solve for x
   x = 379,196,278.72/21,723.33
6. Step 6: Final answer
   x = 17,455.72