Finding the Fourth Proportional to 109.97, 151.61 and 78.83

Step by Step Solution

1. Step 1: Write the proportion equation
   109.97 : 151.61 = 78.83 : x
2. Step 2: Convert to fraction form
   109.97/151.61 = 78.83/x
3. Step 3: Cross multiply
   109.97x = 151.61 × 78.83
4. Step 4: Simplify right side
   109.97x = 11,951.02
5. Step 5: Solve for x
   x = 11,951.02/109.97
6. Step 6: Final answer
   x = 108.68