Finding the Fourth Proportional to 21,604.50, 29,802.12 and 12,650.28

Step by Step Solution

1. Step 1: Write the proportion equation
   21,604.50 : 29,802.12 = 12,650.28 : x
2. Step 2: Convert to fraction form
   21,604.50/29,802.12 = 12,650.28/x
3. Step 3: Cross multiply
   21,604.50x = 29,802.12 × 12,650.28
4. Step 4: Simplify right side
   21,604.50x = 377,005,162.59
5. Step 5: Solve for x
   x = 377,005,162.59/21,604.50
6. Step 6: Final answer
   x = 17,450.31