Finding the Fourth Proportional to 103.98, 143.37 and 74.82

Step by Step Solution

1. Step 1: Write the proportion equation
   103.98 : 143.37 = 74.82 : x
2. Step 2: Convert to fraction form
   103.98/143.37 = 74.82/x
3. Step 3: Cross multiply
   103.98x = 143.37 × 74.82
4. Step 4: Simplify right side
   103.98x = 10,726.94
5. Step 5: Solve for x
   x = 10,726.94/103.98
6. Step 6: Final answer
   x = 103.16