Finding the Fourth Proportional to 115.10, 158.82 and 65.98

Step by Step Solution

1. Step 1: Write the proportion equation
   115.10 : 158.82 = 65.98 : x
2. Step 2: Convert to fraction form
   115.10/158.82 = 65.98/x
3. Step 3: Cross multiply
   115.10x = 158.82 × 65.98
4. Step 4: Simplify right side
   115.10x = 10,478.69
5. Step 5: Solve for x
   x = 10,478.69/115.10
6. Step 6: Final answer
   x = 91.04