Finding the Fourth Proportional to 105.50, 157.24 and 100.98

Step by Step Solution

1. Step 1: Write the proportion equation
   105.50 : 157.24 = 100.98 : x
2. Step 2: Convert to fraction form
   105.50/157.24 = 100.98/x
3. Step 3: Cross multiply
   105.50x = 157.24 × 100.98
4. Step 4: Simplify right side
   105.50x = 15,878.22
5. Step 5: Solve for x
   x = 15,878.22/105.50
6. Step 6: Final answer
   x = 150.50