Finding the Fourth Proportional to 72.54, 108.69 and 52.22

Step by Step Solution

1. Step 1: Write the proportion equation
   72.54 : 108.69 = 52.22 : x
2. Step 2: Convert to fraction form
   72.54/108.69 = 52.22/x
3. Step 3: Cross multiply
   72.54x = 108.69 × 52.22
4. Step 4: Simplify right side
   72.54x = 5,675.25
5. Step 5: Solve for x
   x = 5,675.25/72.54
6. Step 6: Final answer
   x = 78.24