Finding the Fourth Proportional to 72.74, 109.24 and 53.52

Step by Step Solution

1. Step 1: Write the proportion equation
   72.74 : 109.24 = 53.52 : x
2. Step 2: Convert to fraction form
   72.74/109.24 = 53.52/x
3. Step 3: Cross multiply
   72.74x = 109.24 × 53.52
4. Step 4: Simplify right side
   72.74x = 5,846.59
5. Step 5: Solve for x
   x = 5,846.59/72.74
6. Step 6: Final answer
   x = 80.38