Finding the Fourth Proportional to 103.82, 143.16 and 71.06

Step by Step Solution

1. Step 1: Write the proportion equation
   103.82 : 143.16 = 71.06 : x
2. Step 2: Convert to fraction form
   103.82/143.16 = 71.06/x
3. Step 3: Cross multiply
   103.82x = 143.16 × 71.06
4. Step 4: Simplify right side
   103.82x = 10,172.95
5. Step 5: Solve for x
   x = 10,172.95/103.82
6. Step 6: Final answer
   x = 97.99