Finding the Fourth Proportional to 103.20, 142.34 and 73.69

Step by Step Solution

1. Step 1: Write the proportion equation
   103.20 : 142.34 = 73.69 : x
2. Step 2: Convert to fraction form
   103.20/142.34 = 73.69/x
3. Step 3: Cross multiply
   103.20x = 142.34 × 73.69
4. Step 4: Simplify right side
   103.20x = 10,488.31
5. Step 5: Solve for x
   x = 10,488.31/103.20
6. Step 6: Final answer
   x = 101.63