Finding the Fourth Proportional to 21,851.88, 30,155.53 and 12,422.26

Step by Step Solution

1. Step 1: Write the proportion equation
   21,851.88 : 30,155.53 = 12,422.26 : x
2. Step 2: Convert to fraction form
   21,851.88/30,155.53 = 12,422.26/x
3. Step 3: Cross multiply
   21,851.88x = 30,155.53 × 12,422.26
4. Step 4: Simplify right side
   21,851.88x = 374,599,834.10
5. Step 5: Solve for x
   x = 374,599,834.10/21,851.88
6. Step 6: Final answer
   x = 17,142.68