Finding the Fourth Proportional to 143,379.52, 197,868.72 and 79,720

Step by Step Solution

1. Step 1: Write the proportion equation
   143,379.52 : 197,868.72 = 79,720 : x
2. Step 2: Convert to fraction form
   143,379.52/197,868.72 = 79,720/x
3. Step 3: Cross multiply
   143,379.52x = 197,868.72 × 79,720
4. Step 4: Simplify right side
   143,379.52x = 15,774,094,358.40
5. Step 5: Solve for x
   x = 15,774,094,358.40/143,379.52
6. Step 6: Final answer
   x = 110,016.37