Finding the Fourth Proportional to 21,798.24, 30,082.55 and 12,846.12

Step by Step Solution

1. Step 1: Write the proportion equation
   21,798.24 : 30,082.55 = 12,846.12 : x
2. Step 2: Convert to fraction form
   21,798.24/30,082.55 = 12,846.12/x
3. Step 3: Cross multiply
   21,798.24x = 30,082.55 × 12,846.12
4. Step 4: Simplify right side
   21,798.24x = 386,443,928.91
5. Step 5: Solve for x
   x = 386,443,928.91/21,798.24
6. Step 6: Final answer
   x = 17,728.22