Finding the Fourth Proportional to 118.82, 178.06 and 57.89

Step by Step Solution

1. Step 1: Write the proportion equation
   118.82 : 178.06 = 57.89 : x
2. Step 2: Convert to fraction form
   118.82/178.06 = 57.89/x
3. Step 3: Cross multiply
   118.82x = 178.06 × 57.89
4. Step 4: Simplify right side
   118.82x = 10,307.89
5. Step 5: Solve for x
   x = 10,307.89/118.82
6. Step 6: Final answer
   x = 86.75