Finding the Fourth Proportional to 116.27, 160.47 and 78.98

Step by Step Solution

1. Step 1: Write the proportion equation
   116.27 : 160.47 = 78.98 : x
2. Step 2: Convert to fraction form
   116.27/160.47 = 78.98/x
3. Step 3: Cross multiply
   116.27x = 160.47 × 78.98
4. Step 4: Simplify right side
   116.27x = 12,674.84
5. Step 5: Solve for x
   x = 12,674.84/116.27
6. Step 6: Final answer
   x = 109.02