Finding the Fourth Proportional to 21,912.72, 30,242.52 and 12,482.16

Step by Step Solution

1. Step 1: Write the proportion equation
   21,912.72 : 30,242.52 = 12,482.16 : x
2. Step 2: Convert to fraction form
   21,912.72/30,242.52 = 12,482.16/x
3. Step 3: Cross multiply
   21,912.72x = 30,242.52 × 12,482.16
4. Step 4: Simplify right side
   21,912.72x = 377,491,973.44
5. Step 5: Solve for x
   x = 377,491,973.44/21,912.72
6. Step 6: Final answer
   x = 17,227.07