Finding the Fourth Proportional to 123.72, 185.35 and 108.45

Step by Step Solution

1. Step 1: Write the proportion equation
   123.72 : 185.35 = 108.45 : x
2. Step 2: Convert to fraction form
   123.72/185.35 = 108.45/x
3. Step 3: Cross multiply
   123.72x = 185.35 × 108.45
4. Step 4: Simplify right side
   123.72x = 20,100.67
5. Step 5: Solve for x
   x = 20,100.67/123.72
6. Step 6: Final answer
   x = 162.48