Finding the Fourth Proportional to 123.94, 185.71 and 75.21

Step by Step Solution

1. Step 1: Write the proportion equation
   123.94 : 185.71 = 75.21 : x
2. Step 2: Convert to fraction form
   123.94/185.71 = 75.21/x
3. Step 3: Cross multiply
   123.94x = 185.71 × 75.21
4. Step 4: Simplify right side
   123.94x = 13,966.23
5. Step 5: Solve for x
   x = 13,966.23/123.94
6. Step 6: Final answer
   x = 112.69