Finding the Fourth Proportional to 21,922.38, 30,252.96 and 12,491.01

Step by Step Solution

1. Step 1: Write the proportion equation
   21,922.38 : 30,252.96 = 12,491.01 : x
2. Step 2: Convert to fraction form
   21,922.38/30,252.96 = 12,491.01/x
3. Step 3: Cross multiply
   21,922.38x = 30,252.96 × 12,491.01
4. Step 4: Simplify right side
   21,922.38x = 377,890,025.89
5. Step 5: Solve for x
   x = 377,890,025.89/21,922.38
6. Step 6: Final answer
   x = 17,237.64