Finding the Fourth Proportional to 103.37, 142.69 and 72.32

Step by Step Solution

1. Step 1: Write the proportion equation
   103.37 : 142.69 = 72.32 : x
2. Step 2: Convert to fraction form
   103.37/142.69 = 72.32/x
3. Step 3: Cross multiply
   103.37x = 142.69 × 72.32
4. Step 4: Simplify right side
   103.37x = 10,318.45
5. Step 5: Solve for x
   x = 10,318.45/103.37
6. Step 6: Final answer
   x = 99.82