Finding the Fourth Proportional to 142,078.24, 213,102.78 and 89,327.80

Step by Step Solution

1. Step 1: Write the proportion equation
   142,078.24 : 213,102.78 = 89,327.80 : x
2. Step 2: Convert to fraction form
   142,078.24/213,102.78 = 89,327.80/x
3. Step 3: Cross multiply
   142,078.24x = 213,102.78 × 89,327.80
4. Step 4: Simplify right side
   142,078.24x = 19,036,002,511.28
5. Step 5: Solve for x
   x = 19,036,002,511.28/142,078.24
6. Step 6: Final answer
   x = 133,982.53