Finding the Fourth Proportional to 21,799.24, 30,083.93 and 12,847.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,799.24 : 30,083.93 = 12,847.12 : x
2. Step 2: Convert to fraction form
   21,799.24/30,083.93 = 12,847.12/x
3. Step 3: Cross multiply
   21,799.24x = 30,083.93 × 12,847.12
4. Step 4: Simplify right side
   21,799.24x = 386,491,858.78
5. Step 5: Solve for x
   x = 386,491,858.78/21,799.24
6. Step 6: Final answer
   x = 17,729.60