Finding the Fourth Proportional to 21,924.24, 30,255.60 and 12,492.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,924.24 : 30,255.60 = 12,492.72 : x
2. Step 2: Convert to fraction form
   21,924.24/30,255.60 = 12,492.72/x
3. Step 3: Cross multiply
   21,924.24x = 30,255.60 × 12,492.72
4. Step 4: Simplify right side
   21,924.24x = 377,974,739.23
5. Step 5: Solve for x
   x = 377,974,739.23/21,924.24
6. Step 6: Final answer
   x = 17,240.04