Finding the Fourth Proportional to 72.72, 108.98 and 53.47

Step by Step Solution

1. Step 1: Write the proportion equation
   72.72 : 108.98 = 53.47 : x
2. Step 2: Convert to fraction form
   72.72/108.98 = 53.47/x
3. Step 3: Cross multiply
   72.72x = 108.98 × 53.47
4. Step 4: Simplify right side
   72.72x = 5,826.62
5. Step 5: Solve for x
   x = 5,826.62/72.72
6. Step 6: Final answer
   x = 80.12