Finding the Fourth Proportional to 103.83, 155.58 and 67.78

Step by Step Solution

1. Step 1: Write the proportion equation
   103.83 : 155.58 = 67.78 : x
2. Step 2: Convert to fraction form
   103.83/155.58 = 67.78/x
3. Step 3: Cross multiply
   103.83x = 155.58 × 67.78
4. Step 4: Simplify right side
   103.83x = 10,545.21
5. Step 5: Solve for x
   x = 10,545.21/103.83
6. Step 6: Final answer
   x = 101.56