Finding the Fourth Proportional to 143,105.89, 197,478.41 and 79,439.59

Step by Step Solution

1. Step 1: Write the proportion equation
   143,105.89 : 197,478.41 = 79,439.59 : x
2. Step 2: Convert to fraction form
   143,105.89/197,478.41 = 79,439.59/x
3. Step 3: Cross multiply
   143,105.89x = 197,478.41 × 79,439.59
4. Step 4: Simplify right side
   143,105.89x = 15,687,603,924.25
5. Step 5: Solve for x
   x = 15,687,603,924.25/143,105.89
6. Step 6: Final answer
   x = 109,622.35