Finding the Fourth Proportional to 78.83, 118.28 and 61.73

Step by Step Solution

1. Step 1: Write the proportion equation
   78.83 : 118.28 = 61.73 : x
2. Step 2: Convert to fraction form
   78.83/118.28 = 61.73/x
3. Step 3: Cross multiply
   78.83x = 118.28 × 61.73
4. Step 4: Simplify right side
   78.83x = 7,301.42
5. Step 5: Solve for x
   x = 7,301.42/78.83
6. Step 6: Final answer
   x = 92.62