Finding the Fourth Proportional to 23,826.89, 32,879.64 and 13,216.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,826.89 : 32,879.64 = 13,216.31 : x
2. Step 2: Convert to fraction form
   23,826.89/32,879.64 = 13,216.31/x
3. Step 3: Cross multiply
   23,826.89x = 32,879.64 × 13,216.31
4. Step 4: Simplify right side
   23,826.89x = 434,547,514.93
5. Step 5: Solve for x
   x = 434,547,514.93/23,826.89
6. Step 6: Final answer
   x = 18,237.69