Finding the Fourth Proportional to 143,759.77, 198,389.82 and 79,231.31

Step by Step Solution

1. Step 1: Write the proportion equation
   143,759.77 : 198,389.82 = 79,231.31 : x
2. Step 2: Convert to fraction form
   143,759.77/198,389.82 = 79,231.31/x
3. Step 3: Cross multiply
   143,759.77x = 198,389.82 × 79,231.31
4. Step 4: Simplify right side
   143,759.77x = 15,718,685,081.28
5. Step 5: Solve for x
   x = 15,718,685,081.28/143,759.77
6. Step 6: Final answer
   x = 109,339.95