Finding the Fourth Proportional to 78.67, 108.59 and 49.58

Step by Step Solution

1. Step 1: Write the proportion equation
   78.67 : 108.59 = 49.58 : x
2. Step 2: Convert to fraction form
   78.67/108.59 = 49.58/x
3. Step 3: Cross multiply
   78.67x = 108.59 × 49.58
4. Step 4: Simplify right side
   78.67x = 5,383.10
5. Step 5: Solve for x
   x = 5,383.10/78.67
6. Step 6: Final answer
   x = 68.43