Finding the Fourth Proportional to 105.78, 146.04 and 68.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105.78 : 146.04 = 68.94 : x
2. Step 2: Convert to fraction form
   105.78/146.04 = 68.94/x
3. Step 3: Cross multiply
   105.78x = 146.04 × 68.94
4. Step 4: Simplify right side
   105.78x = 10,068.00
5. Step 5: Solve for x
   x = 10,068.00/105.78
6. Step 6: Final answer
   x = 95.18