Finding the Fourth Proportional to 143,251.20, 197,625.42 and 89,499.60

Step by Step Solution

1. Step 1: Write the proportion equation
   143,251.20 : 197,625.42 = 89,499.60 : x
2. Step 2: Convert to fraction form
   143,251.20/197,625.42 = 89,499.60/x
3. Step 3: Cross multiply
   143,251.20x = 197,625.42 × 89,499.60
4. Step 4: Simplify right side
   143,251.20x = 17,687,396,039.83
5. Step 5: Solve for x
   x = 17,687,396,039.83/143,251.20
6. Step 6: Final answer
   x = 123,471.19