Finding the Fourth Proportional to 16,779.33, 23,121.33 and 12,979.41

Step by Step Solution

1. Step 1: Write the proportion equation
   16,779.33 : 23,121.33 = 12,979.41 : x
2. Step 2: Convert to fraction form
   16,779.33/23,121.33 = 12,979.41/x
3. Step 3: Cross multiply
   16,779.33x = 23,121.33 × 12,979.41
4. Step 4: Simplify right side
   16,779.33x = 300,101,221.82
5. Step 5: Solve for x
   x = 300,101,221.82/16,779.33
6. Step 6: Final answer
   x = 17,885.17