Finding the Fourth Proportional to 143,991, 198,707.01 and 80,328.72

Step by Step Solution

1. Step 1: Write the proportion equation
   143,991 : 198,707.01 = 80,328.72 : x
2. Step 2: Convert to fraction form
   143,991/198,707.01 = 80,328.72/x
3. Step 3: Cross multiply
   143,991x = 198,707.01 × 80,328.72
4. Step 4: Simplify right side
   143,991x = 15,961,879,768.33
5. Step 5: Solve for x
   x = 15,961,879,768.33/143,991
6. Step 6: Final answer
   x = 110,853.32