Finding the Fourth Proportional to 103.45, 142.69 and 73.94

Step by Step Solution

1. Step 1: Write the proportion equation
   103.45 : 142.69 = 73.94 : x
2. Step 2: Convert to fraction form
   103.45/142.69 = 73.94/x
3. Step 3: Cross multiply
   103.45x = 142.69 × 73.94
4. Step 4: Simplify right side
   103.45x = 10,550.50
5. Step 5: Solve for x
   x = 10,550.50/103.45
6. Step 6: Final answer
   x = 101.99