Finding the Fourth Proportional to 81,889.82, 113,069.55 and 80,581.97

Step by Step Solution

1. Step 1: Write the proportion equation
   81,889.82 : 113,069.55 = 80,581.97 : x
2. Step 2: Convert to fraction form
   81,889.82/113,069.55 = 80,581.97/x
3. Step 3: Cross multiply
   81,889.82x = 113,069.55 × 80,581.97
4. Step 4: Simplify right side
   81,889.82x = 9,111,366,520.67
5. Step 5: Solve for x
   x = 9,111,366,520.67/81,889.82
6. Step 6: Final answer
   x = 111,263.73