Finding the Fourth Proportional to 72.68, 108.88 and 53.46

Step by Step Solution

1. Step 1: Write the proportion equation
   72.68 : 108.88 = 53.46 : x
2. Step 2: Convert to fraction form
   72.68/108.88 = 53.46/x
3. Step 3: Cross multiply
   72.68x = 108.88 × 53.46
4. Step 4: Simplify right side
   72.68x = 5,820.72
5. Step 5: Solve for x
   x = 5,820.72/72.68
6. Step 6: Final answer
   x = 80.09