Finding the Fourth Proportional to 72.18, 108.15 and 41.73

Step by Step Solution

1. Step 1: Write the proportion equation
   72.18 : 108.15 = 41.73 : x
2. Step 2: Convert to fraction form
   72.18/108.15 = 41.73/x
3. Step 3: Cross multiply
   72.18x = 108.15 × 41.73
4. Step 4: Simplify right side
   72.18x = 4,513.10
5. Step 5: Solve for x
   x = 4,513.10/72.18
6. Step 6: Final answer
   x = 62.53