Finding the Fourth Proportional to 105.55, 158.15 and 65.00

Step by Step Solution

1. Step 1: Write the proportion equation
   105.55 : 158.15 = 65.00 : x
2. Step 2: Convert to fraction form
   105.55/158.15 = 65.00/x
3. Step 3: Cross multiply
   105.55x = 158.15 × 65.00
4. Step 4: Simplify right side
   105.55x = 10,280.31
5. Step 5: Solve for x
   x = 10,280.31/105.55
6. Step 6: Final answer
   x = 97.39