Finding the Fourth Proportional to 142,367.70, 196,476.69 and 81,945.78

Step by Step Solution

1. Step 1: Write the proportion equation
   142,367.70 : 196,476.69 = 81,945.78 : x
2. Step 2: Convert to fraction form
   142,367.70/196,476.69 = 81,945.78/x
3. Step 3: Cross multiply
   142,367.70x = 196,476.69 × 81,945.78
4. Step 4: Simplify right side
   142,367.70x = 16,100,435,613.87
5. Step 5: Solve for x
   x = 16,100,435,613.87/142,367.70
6. Step 6: Final answer
   x = 113,090.51