Finding the Fourth Proportional to 21,914.88, 30,244.76 and 13,422.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,914.88 : 30,244.76 = 13,422.61 : x
2. Step 2: Convert to fraction form
   21,914.88/30,244.76 = 13,422.61/x
3. Step 3: Cross multiply
   21,914.88x = 30,244.76 × 13,422.61
4. Step 4: Simplify right side
   21,914.88x = 405,963,618.02
5. Step 5: Solve for x
   x = 405,963,618.02/21,914.88
6. Step 6: Final answer
   x = 18,524.56