Finding the Fourth Proportional to 12,755.97, 19,139.40 and 9,081.81

Step by Step Solution

1. Step 1: Write the proportion equation
   12,755.97 : 19,139.40 = 9,081.81 : x
2. Step 2: Convert to fraction form
   12,755.97/19,139.40 = 9,081.81/x
3. Step 3: Cross multiply
   12,755.97x = 19,139.40 × 9,081.81
4. Step 4: Simplify right side
   12,755.97x = 173,820,394.31
5. Step 5: Solve for x
   x = 173,820,394.31/12,755.97
6. Step 6: Final answer
   x = 13,626.59