Finding the Fourth Proportional to 78.69, 118.07 and 49.83

Step by Step Solution

1. Step 1: Write the proportion equation
   78.69 : 118.07 = 49.83 : x
2. Step 2: Convert to fraction form
   78.69/118.07 = 49.83/x
3. Step 3: Cross multiply
   78.69x = 118.07 × 49.83
4. Step 4: Simplify right side
   78.69x = 5,883.81
5. Step 5: Solve for x
   x = 5,883.81/78.69
6. Step 6: Final answer
   x = 74.77