Finding the Fourth Proportional to 123.48, 185.31 and 109.98

Step by Step Solution

1. Step 1: Write the proportion equation
   123.48 : 185.31 = 109.98 : x
2. Step 2: Convert to fraction form
   123.48/185.31 = 109.98/x
3. Step 3: Cross multiply
   123.48x = 185.31 × 109.98
4. Step 4: Simplify right side
   123.48x = 20,380.39
5. Step 5: Solve for x
   x = 20,380.39/123.48
6. Step 6: Final answer
   x = 165.05