Finding the Fourth Proportional to 105.99, 146.20 and 71.03

Step by Step Solution

1. Step 1: Write the proportion equation
   105.99 : 146.20 = 71.03 : x
2. Step 2: Convert to fraction form
   105.99/146.20 = 71.03/x
3. Step 3: Cross multiply
   105.99x = 146.20 × 71.03
4. Step 4: Simplify right side
   105.99x = 10,384.59
5. Step 5: Solve for x
   x = 10,384.59/105.99
6. Step 6: Final answer
   x = 97.98