Finding the Fourth Proportional to 81,895.72, 113,077.68 and 80,587.88

Step by Step Solution

1. Step 1: Write the proportion equation
   81,895.72 : 113,077.68 = 80,587.88 : x
2. Step 2: Convert to fraction form
   81,895.72/113,077.68 = 80,587.88/x
3. Step 3: Cross multiply
   81,895.72x = 113,077.68 × 80,587.88
4. Step 4: Simplify right side
   81,895.72x = 9,112,690,506.52
5. Step 5: Solve for x
   x = 9,112,690,506.52/81,895.72
6. Step 6: Final answer
   x = 111,271.88