Finding the Fourth Proportional to 143,676.10, 198,218.49 and 87,066.82

Step by Step Solution

1. Step 1: Write the proportion equation
   143,676.10 : 198,218.49 = 87,066.82 : x
2. Step 2: Convert to fraction form
   143,676.10/198,218.49 = 87,066.82/x
3. Step 3: Cross multiply
   143,676.10x = 198,218.49 × 87,066.82
4. Step 4: Simplify right side
   143,676.10x = 17,258,253,589.50
5. Step 5: Solve for x
   x = 17,258,253,589.50/143,676.10
6. Step 6: Final answer
   x = 120,119.17