Finding the Fourth Proportional to 104.29, 144.61 and 100.83

Step by Step Solution

1. Step 1: Write the proportion equation
   104.29 : 144.61 = 100.83 : x
2. Step 2: Convert to fraction form
   104.29/144.61 = 100.83/x
3. Step 3: Cross multiply
   104.29x = 144.61 × 100.83
4. Step 4: Simplify right side
   104.29x = 14,580.52
5. Step 5: Solve for x
   x = 14,580.52/104.29
6. Step 6: Final answer
   x = 139.81