Finding the Fourth Proportional to 72.54, 100.15 and 53.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72.54 : 100.15 = 53.18 : x
2. Step 2: Convert to fraction form
   72.54/100.15 = 53.18/x
3. Step 3: Cross multiply
   72.54x = 100.15 × 53.18
4. Step 4: Simplify right side
   72.54x = 5,325.98
5. Step 5: Solve for x
   x = 5,325.98/72.54
6. Step 6: Final answer
   x = 73.42