Finding the Fourth Proportional to 16,820.28, 23,196.24 and 13,291.92

Step by Step Solution

1. Step 1: Write the proportion equation
   16,820.28 : 23,196.24 = 13,291.92 : x
2. Step 2: Convert to fraction form
   16,820.28/23,196.24 = 13,291.92/x
3. Step 3: Cross multiply
   16,820.28x = 23,196.24 × 13,291.92
4. Step 4: Simplify right side
   16,820.28x = 308,322,566.38
5. Step 5: Solve for x
   x = 308,322,566.38/16,820.28
6. Step 6: Final answer
   x = 18,330.41