Finding the Fourth Proportional to 72.94, 100.54 and 54.49

Step by Step Solution

1. Step 1: Write the proportion equation
   72.94 : 100.54 = 54.49 : x
2. Step 2: Convert to fraction form
   72.94/100.54 = 54.49/x
3. Step 3: Cross multiply
   72.94x = 100.54 × 54.49
4. Step 4: Simplify right side
   72.94x = 5,478.42
5. Step 5: Solve for x
   x = 5,478.42/72.94
6. Step 6: Final answer
   x = 75.11