Finding the Fourth Proportional to 105.83, 145.91 and 88.37

Step by Step Solution

1. Step 1: Write the proportion equation
   105.83 : 145.91 = 88.37 : x
2. Step 2: Convert to fraction form
   105.83/145.91 = 88.37/x
3. Step 3: Cross multiply
   105.83x = 145.91 × 88.37
4. Step 4: Simplify right side
   105.83x = 12,893.56
5. Step 5: Solve for x
   x = 12,893.56/105.83
6. Step 6: Final answer
   x = 121.84