Finding the Fourth Proportional to 123.87, 185.86 and 55.41

Step by Step Solution

1. Step 1: Write the proportion equation
   123.87 : 185.86 = 55.41 : x
2. Step 2: Convert to fraction form
   123.87/185.86 = 55.41/x
3. Step 3: Cross multiply
   123.87x = 185.86 × 55.41
4. Step 4: Simplify right side
   123.87x = 10,298.50
5. Step 5: Solve for x
   x = 10,298.50/123.87
6. Step 6: Final answer
   x = 83.14