Finding the Fourth Proportional to 123.37, 185.05 and 100.55

Step by Step Solution

1. Step 1: Write the proportion equation
   123.37 : 185.05 = 100.55 : x
2. Step 2: Convert to fraction form
   123.37/185.05 = 100.55/x
3. Step 3: Cross multiply
   123.37x = 185.05 × 100.55
4. Step 4: Simplify right side
   123.37x = 18,606.78
5. Step 5: Solve for x
   x = 18,606.78/123.37
6. Step 6: Final answer
   x = 150.82