Finding the Fourth Proportional to 144,213.54, 199,013.59 and 79,687

Step by Step Solution

1. Step 1: Write the proportion equation
   144,213.54 : 199,013.59 = 79,687 : x
2. Step 2: Convert to fraction form
   144,213.54/199,013.59 = 79,687/x
3. Step 3: Cross multiply
   144,213.54x = 199,013.59 × 79,687
4. Step 4: Simplify right side
   144,213.54x = 15,858,795,946.33
5. Step 5: Solve for x
   x = 15,858,795,946.33/144,213.54
6. Step 6: Final answer
   x = 109,967.45