Finding the Fourth Proportional to 103.86, 155.88 and 83.82

Step by Step Solution

1. Step 1: Write the proportion equation
   103.86 : 155.88 = 83.82 : x
2. Step 2: Convert to fraction form
   103.86/155.88 = 83.82/x
3. Step 3: Cross multiply
   103.86x = 155.88 × 83.82
4. Step 4: Simplify right side
   103.86x = 13,065.86
5. Step 5: Solve for x
   x = 13,065.86/103.86
6. Step 6: Final answer
   x = 125.80