Finding the Fourth Proportional to 81,104.89, 111,111.84 and 78,072.56

Step by Step Solution

1. Step 1: Write the proportion equation
   81,104.89 : 111,111.84 = 78,072.56 : x
2. Step 2: Convert to fraction form
   81,104.89/111,111.84 = 78,072.56/x
3. Step 3: Cross multiply
   81,104.89x = 111,111.84 × 78,072.56
4. Step 4: Simplify right side
   81,104.89x = 8,674,786,040.48
5. Step 5: Solve for x
   x = 8,674,786,040.48/81,104.89
6. Step 6: Final answer
   x = 106,957.63