Finding the Fourth Proportional to 72.55, 108.71 and 45.44

Step by Step Solution

1. Step 1: Write the proportion equation
   72.55 : 108.71 = 45.44 : x
2. Step 2: Convert to fraction form
   72.55/108.71 = 45.44/x
3. Step 3: Cross multiply
   72.55x = 108.71 × 45.44
4. Step 4: Simplify right side
   72.55x = 4,939.78
5. Step 5: Solve for x
   x = 4,939.78/72.55
6. Step 6: Final answer
   x = 68.09