Finding the Fourth Proportional to 143,087.38, 197,461.37 and 89,403.55

Step by Step Solution

1. Step 1: Write the proportion equation
   143,087.38 : 197,461.37 = 89,403.55 : x
2. Step 2: Convert to fraction form
   143,087.38/197,461.37 = 89,403.55/x
3. Step 3: Cross multiply
   143,087.38x = 197,461.37 × 89,403.55
4. Step 4: Simplify right side
   143,087.38x = 17,653,747,018.85
5. Step 5: Solve for x
   x = 17,653,747,018.85/143,087.38
6. Step 6: Final answer
   x = 123,377.39