Finding the Fourth Proportional to 78.79, 108.73 and 49.29

Step by Step Solution

1. Step 1: Write the proportion equation
   78.79 : 108.73 = 49.29 : x
2. Step 2: Convert to fraction form
   78.79/108.73 = 49.29/x
3. Step 3: Cross multiply
   78.79x = 108.73 × 49.29
4. Step 4: Simplify right side
   78.79x = 5,359.30
5. Step 5: Solve for x
   x = 5,359.30/78.79
6. Step 6: Final answer
   x = 68.02