Finding the Fourth Proportional to 123.83, 170.79 and 74.69

Step by Step Solution

1. Step 1: Write the proportion equation
   123.83 : 170.79 = 74.69 : x
2. Step 2: Convert to fraction form
   123.83/170.79 = 74.69/x
3. Step 3: Cross multiply
   123.83x = 170.79 × 74.69
4. Step 4: Simplify right side
   123.83x = 12,755.45
5. Step 5: Solve for x
   x = 12,755.45/123.83
6. Step 6: Final answer
   x = 103.01