Finding the Fourth Proportional to 21,758.48, 30,019.56 and 12,196.88

Step by Step Solution

1. Step 1: Write the proportion equation
   21,758.48 : 30,019.56 = 12,196.88 : x
2. Step 2: Convert to fraction form
   21,758.48/30,019.56 = 12,196.88/x
3. Step 3: Cross multiply
   21,758.48x = 30,019.56 × 12,196.88
4. Step 4: Simplify right side
   21,758.48x = 366,144,970.97
5. Step 5: Solve for x
   x = 366,144,970.97/21,758.48
6. Step 6: Final answer
   x = 16,827.69