Finding the Fourth Proportional to 23,965.91, 33,072.98 and 13,355.31

Step by Step Solution

1. Step 1: Write the proportion equation
   23,965.91 : 33,072.98 = 13,355.31 : x
2. Step 2: Convert to fraction form
   23,965.91/33,072.98 = 13,355.31/x
3. Step 3: Cross multiply
   23,965.91x = 33,072.98 × 13,355.31
4. Step 4: Simplify right side
   23,965.91x = 441,699,833.75
5. Step 5: Solve for x
   x = 441,699,833.75/23,965.91
6. Step 6: Final answer
   x = 18,430.34