Finding the Fourth Proportional to 81,971.76, 112,383.71 and 80,477.31

Step by Step Solution

1. Step 1: Write the proportion equation
   81,971.76 : 112,383.71 = 80,477.31 : x
2. Step 2: Convert to fraction form
   81,971.76/112,383.71 = 80,477.31/x
3. Step 3: Cross multiply
   81,971.76x = 112,383.71 × 80,477.31
4. Step 4: Simplify right side
   81,971.76x = 9,044,338,668.62
5. Step 5: Solve for x
   x = 9,044,338,668.62/81,971.76
6. Step 6: Final answer
   x = 110,334.81