Finding the Fourth Proportional to 143,665.86, 198,251.25 and 82,408.89

Step by Step Solution

1. Step 1: Write the proportion equation
   143,665.86 : 198,251.25 = 82,408.89 : x
2. Step 2: Convert to fraction form
   143,665.86/198,251.25 = 82,408.89/x
3. Step 3: Cross multiply
   143,665.86x = 198,251.25 × 82,408.89
4. Step 4: Simplify right side
   143,665.86x = 16,337,665,453.61
5. Step 5: Solve for x
   x = 16,337,665,453.61/143,665.86
6. Step 6: Final answer
   x = 113,719.89