Finding the Fourth Proportional to 105.86, 146.10 and 70.94

Step by Step Solution

1. Step 1: Write the proportion equation
   105.86 : 146.10 = 70.94 : x
2. Step 2: Convert to fraction form
   105.86/146.10 = 70.94/x
3. Step 3: Cross multiply
   105.86x = 146.10 × 70.94
4. Step 4: Simplify right side
   105.86x = 10,364.33
5. Step 5: Solve for x
   x = 10,364.33/105.86
6. Step 6: Final answer
   x = 97.91