Finding the Fourth Proportional to 21,922.18, 30,256.50 and 12,974.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,922.18 : 30,256.50 = 12,974.61 : x
2. Step 2: Convert to fraction form
   21,922.18/30,256.50 = 12,974.61/x
3. Step 3: Cross multiply
   21,922.18x = 30,256.50 × 12,974.61
4. Step 4: Simplify right side
   21,922.18x = 392,566,449.58
5. Step 5: Solve for x
   x = 392,566,449.58/21,922.18
6. Step 6: Final answer
   x = 17,907.27