Finding the Fourth Proportional to 143,965, 198,671.88 and 80,306.83

Step by Step Solution

1. Step 1: Write the proportion equation
   143,965 : 198,671.88 = 80,306.83 : x
2. Step 2: Convert to fraction form
   143,965/198,671.88 = 80,306.83/x
3. Step 3: Cross multiply
   143,965x = 198,671.88 × 80,306.83
4. Step 4: Simplify right side
   143,965x = 15,954,708,892.94
5. Step 5: Solve for x
   x = 15,954,708,892.94/143,965
6. Step 6: Final answer
   x = 110,823.53