Finding the Fourth Proportional to 21,941.89, 30,271.92 and 12,505

Step by Step Solution

1. Step 1: Write the proportion equation
   21,941.89 : 30,271.92 = 12,505 : x
2. Step 2: Convert to fraction form
   21,941.89/30,271.92 = 12,505/x
3. Step 3: Cross multiply
   21,941.89x = 30,271.92 × 12,505
4. Step 4: Simplify right side
   21,941.89x = 378,550,359.60
5. Step 5: Solve for x
   x = 378,550,359.60/21,941.89
6. Step 6: Final answer
   x = 17,252.40