Finding the Fourth Proportional to 142,987.89, 197,241.31 and 89,179.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,987.89 : 197,241.31 = 89,179.49 : x
2. Step 2: Convert to fraction form
   142,987.89/197,241.31 = 89,179.49/x
3. Step 3: Cross multiply
   142,987.89x = 197,241.31 × 89,179.49
4. Step 4: Simplify right side
   142,987.89x = 17,589,880,037.31
5. Step 5: Solve for x
   x = 17,589,880,037.31/142,987.89
6. Step 6: Final answer
   x = 123,016.57