Finding the Fourth Proportional to 105.25, 145.34 and 68.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105.25 : 145.34 = 68.50 : x
2. Step 2: Convert to fraction form
   105.25/145.34 = 68.50/x
3. Step 3: Cross multiply
   105.25x = 145.34 × 68.50
4. Step 4: Simplify right side
   105.25x = 9,955.45
5. Step 5: Solve for x
   x = 9,955.45/105.25
6. Step 6: Final answer
   x = 94.59