Finding the Fourth Proportional to 81,104.71, 111,111.60 and 78,072.38

Step by Step Solution

1. Step 1: Write the proportion equation
   81,104.71 : 111,111.60 = 78,072.38 : x
2. Step 2: Convert to fraction form
   81,104.71/111,111.60 = 78,072.38/x
3. Step 3: Cross multiply
   81,104.71x = 111,111.60 × 78,072.38
4. Step 4: Simplify right side
   81,104.71x = 8,674,747,335.39
5. Step 5: Solve for x
   x = 8,674,747,335.39/81,104.71
6. Step 6: Final answer
   x = 106,957.38