Finding the Fourth Proportional to 22,145.32, 30,564.48 and 13,198

Step by Step Solution

1. Step 1: Write the proportion equation
   22,145.32 : 30,564.48 = 13,198 : x
2. Step 2: Convert to fraction form
   22,145.32/30,564.48 = 13,198/x
3. Step 3: Cross multiply
   22,145.32x = 30,564.48 × 13,198
4. Step 4: Simplify right side
   22,145.32x = 403,390,007.04
5. Step 5: Solve for x
   x = 403,390,007.04/22,145.32
6. Step 6: Final answer
   x = 18,215.59