Finding the Fourth Proportional to 123.89, 185.69 and 69.68

Step by Step Solution

1. Step 1: Write the proportion equation
   123.89 : 185.69 = 69.68 : x
2. Step 2: Convert to fraction form
   123.89/185.69 = 69.68/x
3. Step 3: Cross multiply
   123.89x = 185.69 × 69.68
4. Step 4: Simplify right side
   123.89x = 12,937.60
5. Step 5: Solve for x
   x = 12,937.60/123.89
6. Step 6: Final answer
   x = 104.43