Finding the Fourth Proportional to 103.94, 155.33 and 83.55

Step by Step Solution

1. Step 1: Write the proportion equation
   103.94 : 155.33 = 83.55 : x
2. Step 2: Convert to fraction form
   103.94/155.33 = 83.55/x
3. Step 3: Cross multiply
   103.94x = 155.33 × 83.55
4. Step 4: Simplify right side
   103.94x = 12,977.82
5. Step 5: Solve for x
   x = 12,977.82/103.94
6. Step 6: Final answer
   x = 124.86