Finding the Fourth Proportional to 155.89, 233.86 and 78.94

Step by Step Solution

1. Step 1: Write the proportion equation
   155.89 : 233.86 = 78.94 : x
2. Step 2: Convert to fraction form
   155.89/233.86 = 78.94/x
3. Step 3: Cross multiply
   155.89x = 233.86 × 78.94
4. Step 4: Simplify right side
   155.89x = 18,460.91
5. Step 5: Solve for x
   x = 18,460.91/155.89
6. Step 6: Final answer
   x = 118.42