Finding the Fourth Proportional to 123.97, 185.83 and 55.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123.97 : 185.83 = 55.50 : x
2. Step 2: Convert to fraction form
   123.97/185.83 = 55.50/x
3. Step 3: Cross multiply
   123.97x = 185.83 × 55.50
4. Step 4: Simplify right side
   123.97x = 10,313.57
5. Step 5: Solve for x
   x = 10,313.57/123.97
6. Step 6: Final answer
   x = 83.19