Finding the Fourth Proportional to 79,239.69, 109,155.47 and 67,872.15

Step by Step Solution

1. Step 1: Write the proportion equation
   79,239.69 : 109,155.47 = 67,872.15 : x
2. Step 2: Convert to fraction form
   79,239.69/109,155.47 = 67,872.15/x
3. Step 3: Cross multiply
   79,239.69x = 109,155.47 × 67,872.15
4. Step 4: Simplify right side
   79,239.69x = 7,408,616,093.80
5. Step 5: Solve for x
   x = 7,408,616,093.80/79,239.69
6. Step 6: Final answer
   x = 93,496.28