Finding the Fourth Proportional to 141.89, 195.78 and 83.69

Step by Step Solution

1. Step 1: Write the proportion equation
   141.89 : 195.78 = 83.69 : x
2. Step 2: Convert to fraction form
   141.89/195.78 = 83.69/x
3. Step 3: Cross multiply
   141.89x = 195.78 × 83.69
4. Step 4: Simplify right side
   141.89x = 16,384.83
5. Step 5: Solve for x
   x = 16,384.83/141.89
6. Step 6: Final answer
   x = 115.48