Finding the Fourth Proportional to 21,928.89, 30,254.00 and 12,491.99

Step by Step Solution

1. Step 1: Write the proportion equation
   21,928.89 : 30,254.00 = 12,491.99 : x
2. Step 2: Convert to fraction form
   21,928.89/30,254.00 = 12,491.99/x
3. Step 3: Cross multiply
   21,928.89x = 30,254.00 × 12,491.99
4. Step 4: Simplify right side
   21,928.89x = 377,932,451.73
5. Step 5: Solve for x
   x = 377,932,451.73/21,928.89
6. Step 6: Final answer
   x = 17,234.45