Finding the Fourth Proportional to 143,581.88, 198,143 and 79,918.31

Step by Step Solution

1. Step 1: Write the proportion equation
   143,581.88 : 198,143 = 79,918.31 : x
2. Step 2: Convert to fraction form
   143,581.88/198,143 = 79,918.31/x
3. Step 3: Cross multiply
   143,581.88x = 198,143 × 79,918.31
4. Step 4: Simplify right side
   143,581.88x = 15,835,253,698.33
5. Step 5: Solve for x
   x = 15,835,253,698.33/143,581.88
6. Step 6: Final answer
   x = 110,287.27