Finding the Fourth Proportional to 144,223.05, 199,017.57 and 79,691.57

Step by Step Solution

1. Step 1: Write the proportion equation
   144,223.05 : 199,017.57 = 79,691.57 : x
2. Step 2: Convert to fraction form
   144,223.05/199,017.57 = 79,691.57/x
3. Step 3: Cross multiply
   144,223.05x = 199,017.57 × 79,691.57
4. Step 4: Simplify right side
   144,223.05x = 15,860,022,610.88
5. Step 5: Solve for x
   x = 15,860,022,610.88/144,223.05
6. Step 6: Final answer
   x = 109,968.71