Finding the Fourth Proportional to 142,556.18, 196,708.06 and 85,183.37

Step by Step Solution

1. Step 1: Write the proportion equation
   142,556.18 : 196,708.06 = 85,183.37 : x
2. Step 2: Convert to fraction form
   142,556.18/196,708.06 = 85,183.37/x
3. Step 3: Cross multiply
   142,556.18x = 196,708.06 × 85,183.37
4. Step 4: Simplify right side
   142,556.18x = 16,756,255,317.56
5. Step 5: Solve for x
   x = 16,756,255,317.56/142,556.18
6. Step 6: Final answer
   x = 117,541.42