Finding the Fourth Proportional to 103.48, 155.56 and 83.42

Step by Step Solution

1. Step 1: Write the proportion equation
   103.48 : 155.56 = 83.42 : x
2. Step 2: Convert to fraction form
   103.48/155.56 = 83.42/x
3. Step 3: Cross multiply
   103.48x = 155.56 × 83.42
4. Step 4: Simplify right side
   103.48x = 12,976.82
5. Step 5: Solve for x
   x = 12,976.82/103.48
6. Step 6: Final answer
   x = 125.40