Finding the Fourth Proportional to 105.48, 157.17 and 100.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105.48 : 157.17 = 100.83 : x
2. Step 2: Convert to fraction form
   105.48/157.17 = 100.83/x
3. Step 3: Cross multiply
   105.48x = 157.17 × 100.83
4. Step 4: Simplify right side
   105.48x = 15,847.45
5. Step 5: Solve for x
   x = 15,847.45/105.48
6. Step 6: Final answer
   x = 150.24