Finding the Fourth Proportional to 22,309.31, 33,515.81 and 13,081.79

Step by Step Solution

1. Step 1: Write the proportion equation
   22,309.31 : 33,515.81 = 13,081.79 : x
2. Step 2: Convert to fraction form
   22,309.31/33,515.81 = 13,081.79/x
3. Step 3: Cross multiply
   22,309.31x = 33,515.81 × 13,081.79
4. Step 4: Simplify right side
   22,309.31x = 438,446,788.10
5. Step 5: Solve for x
   x = 438,446,788.10/22,309.31
6. Step 6: Final answer
   x = 19,653.09