Finding the Fourth Proportional to 21,951, 30,292.38 and 12,522.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,951 : 30,292.38 = 12,522.60 : x
2. Step 2: Convert to fraction form
   21,951/30,292.38 = 12,522.60/x
3. Step 3: Cross multiply
   21,951x = 30,292.38 × 12,522.60
4. Step 4: Simplify right side
   21,951x = 379,339,357.79
5. Step 5: Solve for x
   x = 379,339,357.79/21,951
6. Step 6: Final answer
   x = 17,281.19