Finding the Fourth Proportional to 103.52, 155.33 and 78.06

Step by Step Solution

1. Step 1: Write the proportion equation
   103.52 : 155.33 = 78.06 : x
2. Step 2: Convert to fraction form
   103.52/155.33 = 78.06/x
3. Step 3: Cross multiply
   103.52x = 155.33 × 78.06
4. Step 4: Simplify right side
   103.52x = 12,124.67
5. Step 5: Solve for x
   x = 12,124.67/103.52
6. Step 6: Final answer
   x = 117.12