Finding the Fourth Proportional to 81,109.82, 111,984.17 and 72,597.15

Step by Step Solution

1. Step 1: Write the proportion equation
   81,109.82 : 111,984.17 = 72,597.15 : x
2. Step 2: Convert to fraction form
   81,109.82/111,984.17 = 72,597.15/x
3. Step 3: Cross multiply
   81,109.82x = 111,984.17 × 72,597.15
4. Step 4: Simplify right side
   81,109.82x = 8,129,731,224.13
5. Step 5: Solve for x
   x = 8,129,731,224.13/81,109.82
6. Step 6: Final answer
   x = 100,231.16