Finding the Fourth Proportional to 143,020.58, 197,286.37 and 89,212.15

Step by Step Solution

1. Step 1: Write the proportion equation
   143,020.58 : 197,286.37 = 89,212.15 : x
2. Step 2: Convert to fraction form
   143,020.58/197,286.37 = 89,212.15/x
3. Step 3: Cross multiply
   143,020.58x = 197,286.37 × 89,212.15
4. Step 4: Simplify right side
   143,020.58x = 17,600,341,233.40
5. Step 5: Solve for x
   x = 17,600,341,233.40/143,020.58
6. Step 6: Final answer
   x = 123,061.60