Finding the Fourth Proportional to 105.29, 157.59 and 68.76

Step by Step Solution

1. Step 1: Write the proportion equation
   105.29 : 157.59 = 68.76 : x
2. Step 2: Convert to fraction form
   105.29/157.59 = 68.76/x
3. Step 3: Cross multiply
   105.29x = 157.59 × 68.76
4. Step 4: Simplify right side
   105.29x = 10,835.89
5. Step 5: Solve for x
   x = 10,835.89/105.29
6. Step 6: Final answer
   x = 102.92